1. Chapter 12 Math Vocabulary Review
The slides will play on a loop.

2. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

3. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

4. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

5. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

6. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

7. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

8. intersecting lines
Two or more lines that
meet or cross at a point.

9. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

10. Tool used to measure angles.
protractor
Tool used to measure angles.

11. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

12. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

13. acute angle
An angle that measures
LESS than 90 degrees.

14. obtuse angle
An angle that measures
MORE than 90 degrees.

15. straight angle
An angle that measures
180 degrees.

16. polygon four criteria for a A polygon
is made up of all straight line segments
is closed (has no breaks in the line segments)
is 2-dimensitional, plane shape
has no lines that cross over each other
a polygon has line segments, vertices, and angles

17. A polygon with all equal sides and all equal angles.
regular polygon
A polygon with all equal sides and all equal angles.

18. have all equal sides and
irregular polygon
A polygon that does NOT
have all equal sides and
equal angles.

19. quadrilateral
A polygon with 4 sides.

20. pentagon
A polygon with 5 sides.

21. hexagon
A polygon with 6 sides.

22. octagon
A polygon with 8 sides.

23. decagon
A polygon with 10 sides.

24. Rhombus all sides have equal length all opposite sides are parallel
opposite angles are equal

26. rectangle A rectangle: four criteria of a is a quadrilateral.
is a quadrilateral.
is made up of four line segments.
has four 90° angles.
is a parallelogram – a four sided polygon with two pairs of parallel sides.

27. A quadrilateral (four sided polygon) with two pairs of parallel sides.
parallelogram
A quadrilateral (four sided polygon) with two pairs of parallel sides.

28. A quadrilateral (four sided polygon) with one pair of parallel sides.
trapezoid
A quadrilateral (four sided polygon) with one pair of parallel sides.

29. congruent Figures that have the same size AND same shape.
The figures do not have be in the same position.
If you placed the two shapes directly on top of each other they would match up perfectly.

30. Polygons can be classified by the number of sides they have:
Prefix
Meaning
Word
tri- 3
triangle
quad- 4
quadrilateral
pent- 5
pentagon
hex- 6
hexagon
oct- 8
octagon
deca- 10
decagon
a pen or a pencil is in your hand that has 5 fingers.
tricycle has 3 wheels
quad runner has 4 wheels
tri-
quad-
pent-
hex and six both have has an “x”
an octopus has 8 tentacles
a decade is a period of 10 years
hex-
oct-
deca-

31. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

32. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

33. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

34. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

35. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

36. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

37. intersecting lines
Two or more lines that
meet or cross at a point.

38. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

39. Tool used to measure angles.
protractor
Tool used to measure angles.

40. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

41. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

42. acute angle
An angle that measures
LESS than 90 degrees.

43. obtuse angle
An angle that measures
MORE than 90 degrees.

44. straight angle
An angle that measures
180 degrees.

45. polygon four criteria for a A polygon
is made up of all straight line segments
is closed (has no breaks in the line segments)
is 2-dimensitional, plane shape
has no lines that cross over each other
a polygon has line segments, vertices, and angles

46. A polygon with all equal sides and all equal angles.
regular polygon
A polygon with all equal sides and all equal angles.

47. have all equal sides and
irregular polygon
A polygon that does NOT
have all equal sides and
equal angles.

48. quadrilateral
A polygon with 4 sides.

49. pentagon
A polygon with 5 sides.

50. hexagon
A polygon with 6 sides.

51. octagon
A polygon with 8 sides.

52. decagon
A polygon with 10 sides.

53. Rhombus all sides have equal length all opposite sides are parallel
opposite angles are equal

55. rectangle A rectangle: four criteria of a is a quadrilateral.
is a quadrilateral.
is made up of four line segments.
has four 90° angles.
is a parallelogram – a four sided polygon with two pairs of parallel sides.

56. A quadrilateral (four sided polygon) with two pairs of parallel sides.
parallelogram
A quadrilateral (four sided polygon) with two pairs of parallel sides.

57. A quadrilateral (four sided polygon) with one pair of parallel sides.
trapezoid
A quadrilateral (four sided polygon) with one pair of parallel sides.

58. congruent Figures that have the same size AND same shape.
The figures do not have be in the same position.
If you placed the two shapes directly on top of each other they would match up perfectly.

59. Polygons can be classified by the number of sides they have:
Prefix
Meaning
Word
tri- 3
triangle
quad- 4
quadrilateral
pent- 5
pentagon
hex- 6
hexagon
oct- 8
octagon
deca- 10
decagon
a pen or a pencil is in your hand that has 5 fingers.
tricycle has 3 wheels
quad runner has 4 wheels
tri-
quad-
pent-
hex and six both have has an “x”
an octopus has 8 tentacles
a decade is a period of 10 years
hex-
oct-
deca-

60. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

61. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

62. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

63. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

64. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

65. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

66. intersecting lines
Two or more lines that
meet or cross at a point.

67. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

68. Tool used to measure angles.
protractor
Tool used to measure angles.

69. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

70. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

71. acute angle
An angle that measures
LESS than 90 degrees.

72. obtuse angle
An angle that measures
MORE than 90 degrees.

73. straight angle
An angle that measures
180 degrees.

74. polygon four criteria for a A polygon
is made up of all straight line segments
is closed (has no breaks in the line segments)
is 2-dimensitional, plane shape
has no lines that cross over each other
a polygon has line segments, vertices, and angles

75. A polygon with all equal sides and all equal angles.
regular polygon
A polygon with all equal sides and all equal angles.

76. have all equal sides and
irregular polygon
A polygon that does NOT
have all equal sides and
equal angles.

77. quadrilateral
A polygon with 4 sides.

78. pentagon
A polygon with 5 sides.

79. hexagon
A polygon with 6 sides.

80. octagon
A polygon with 8 sides.

81. decagon
A polygon with 10 sides.

82. Rhombus all sides have equal length all opposite sides are parallel
opposite angles are equal

84. rectangle A rectangle: four criteria of a is a quadrilateral.
is a quadrilateral.
is made up of four line segments.
has four 90° angles.
is a parallelogram – a four sided polygon with two pairs of parallel sides.

85. A quadrilateral (four sided polygon) with two pairs of parallel sides.
parallelogram
A quadrilateral (four sided polygon) with two pairs of parallel sides.

86. A quadrilateral (four sided polygon) with one pair of parallel sides.
trapezoid
A quadrilateral (four sided polygon) with one pair of parallel sides.

87. congruent Figures that have the same size AND same shape.
The figures do not have be in the same position.
If you placed the two shapes directly on top of each other they would match up perfectly.

88. Polygons can be classified by the number of sides they have:
Prefix
Meaning
Word
tri- 3
triangle
quad- 4
quadrilateral
pent- 5
pentagon
hex- 6
hexagon
oct- 8
octagon
deca- 10
decagon
a pen or a pencil is in your hand that has 5 fingers.
tricycle has 3 wheels
quad runner has 4 wheels
tri-
quad-
pent-
hex and six both have has an “x”
an octopus has 8 tentacles
a decade is a period of 10 years
hex-
oct-
deca-

89. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

90. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

91. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

92. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

93. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

94. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

95. intersecting lines
Two or more lines that
meet or cross at a point.

96. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

97. Tool used to measure angles.
protractor
Tool used to measure angles.

98. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

99. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

100. acute angle
An angle that measures
LESS than 90 degrees.

101. obtuse angle
An angle that measures
MORE than 90 degrees.

102. straight angle
An angle that measures
180 degrees.

103. polygon four criteria for a A polygon
is made up of all straight line segments
is closed (has no breaks in the line segments)
is 2-dimensitional, plane shape
has no lines that cross over each other
a polygon has line segments, vertices, and angles

104. A polygon with all equal sides and all equal angles.
regular polygon
A polygon with all equal sides and all equal angles.

105. have all equal sides and
irregular polygon
A polygon that does NOT
have all equal sides and
equal angles.

106. quadrilateral
A polygon with 4 sides.

107. pentagon
A polygon with 5 sides.

108. hexagon
A polygon with 6 sides.

109. octagon
A polygon with 8 sides.

110. decagon
A polygon with 10 sides.

111. Rhombus all sides have equal length all opposite sides are parallel
opposite angles are equal

113. rectangle A rectangle: four criteria of a is a quadrilateral.
is a quadrilateral.
is made up of four line segments.
has four 90° angles.
is a parallelogram – a four sided polygon with two pairs of parallel sides.

114. A quadrilateral (four sided polygon) with two pairs of parallel sides.
parallelogram
A quadrilateral (four sided polygon) with two pairs of parallel sides.

115. A quadrilateral (four sided polygon) with one pair of parallel sides.
trapezoid
A quadrilateral (four sided polygon) with one pair of parallel sides.

116. congruent Figures that have the same size AND same shape.
The figures do not have be in the same position.
If you placed the two shapes directly on top of each other they would match up perfectly.

117. Polygons can be classified by the number of sides they have:
Prefix
Meaning
Word
tri- 3
triangle
quad- 4
quadrilateral
pent- 5
pentagon
hex- 6
hexagon
oct- 8
octagon
deca- 10
decagon
a pen or a pencil is in your hand that has 5 fingers.
tricycle has 3 wheels
quad runner has 4 wheels
tri-
quad-
pent-
hex and six both have has an “x”
an octopus has 8 tentacles
a decade is a period of 10 years
hex-
oct-
deca-

118. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

119. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

120. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

121. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

122. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

123. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

124. intersecting lines
Two or more lines that
meet or cross at a point.

125. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

126. Tool used to measure angles.
protractor
Tool used to measure angles.

127. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

128. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

129. acute angle
An angle that measures
LESS than 90 degrees.

130. obtuse angle
An angle that measures
MORE than 90 degrees.

131. straight angle
An angle that measures
180 degrees.

132. polygon four criteria for a A polygon
is made up of all straight line segments
is closed (has no breaks in the line segments)
is 2-dimensitional, plane shape
has no lines that cross over each other
a polygon has line segments, vertices, and angles

133. A polygon with all equal sides and all equal angles.
regular polygon
A polygon with all equal sides and all equal angles.

134. have all equal sides and
irregular polygon
A polygon that does NOT
have all equal sides and
equal angles.

135. quadrilateral
A polygon with 4 sides.

136. pentagon
A polygon with 5 sides.

137. hexagon
A polygon with 6 sides.

138. octagon
A polygon with 8 sides.

139. decagon
A polygon with 10 sides.

140. Rhombus all sides have equal length all opposite sides are parallel
opposite angles are equal

142. rectangle A rectangle: four criteria of a is a quadrilateral.
is a quadrilateral.
is made up of four line segments.
has four 90° angles.
is a parallelogram – a four sided polygon with two pairs of parallel sides.

143. A quadrilateral (four sided polygon) with two pairs of parallel sides.
parallelogram
A quadrilateral (four sided polygon) with two pairs of parallel sides.

144. A quadrilateral (four sided polygon) with one pair of parallel sides.
trapezoid
A quadrilateral (four sided polygon) with one pair of parallel sides.

145. congruent Figures that have the same size AND same shape.
The figures do not have be in the same position.
If you placed the two shapes directly on top of each other they would match up perfectly.

146. Polygons can be classified by the number of sides they have:
Prefix
Meaning
Word
tri- 3
triangle
quad- 4
quadrilateral
pent- 5
pentagon
hex- 6
hexagon
oct- 8
octagon
deca- 10
decagon
a pen or a pencil is in your hand that has 5 fingers.
tricycle has 3 wheels
quad runner has 4 wheels
tri-
quad-
pent-
hex and six both have has an “x”
an octopus has 8 tentacles
a decade is a period of 10 years
hex-
oct-
deca-