1. Geometric Figures Review
Chapter 19
Harcourt Math

2. An exact position or location
Point
An exact position or location

3. It continues in both directions and doesn’t end (arrows)
Line
It continues in both directions and doesn’t end (arrows)

4. Line Segment
It is a part of a line and has 2 endpoints

5. Ray
A part of a line, with one endpoint, that is straight and continues in one direction.

6. A figure formed by 2 rays or line segments that share an endpoint.
Angle
A figure formed by 2 rays or line segments that share an endpoint.

7. Right Angle
A special “L” shaped angle that forms a square corner; a right angle measures 90°.

8. Acute Angle
An angle that has a measure less than a right angle.

9. An angle that has a measure greater than a right angle
Obtuse Angle
An angle that has a measure greater than a right angle

10. Intersecting Lines
Lines that cross

11. Lines that never cross; lines that are always the same distance apart.
Parallel Lines
Lines that never cross; lines that are always the same distance apart.
                                                                       

12. Perpendicular Lines
Lines that intersect to form right angles

13. A closed plane figure with straight sides that are line segments.
Polygon
A closed plane figure with straight sides that are line segments.

14. A triangle that has 3 equal sides
Equilateral Triangle
A triangle that has 3 equal sides
and 3 equal angles

15. A triangle that has two equal sides
Isosceles Triangle
A triangle that has two equal sides

16. A triangle with one right angle
Right Triangle
A triangle with one right angle

17. Quadrilateral
A four-sided polygon.

18. A four-sided polygon with two pairs of parallel sides.
Parallelogram
A four-sided polygon with two pairs of parallel sides.

19. Rhombus A quadrilateral with 2 pairs of
parallel sides and 4 equal sides

20. 2 pairs of parallel sides,
Rectangle
A quadrilateral with
2 pairs of parallel sides,
2 pairs of equal sides,
and 4 right angles

21. A four-sided polygon having exactly one pair of parallel sides.
Trapezoid
A four-sided polygon having exactly one pair of parallel sides.

22. A polygon with 5 sides and 5 angles
Pentagon
A polygon with 5 sides and 5 angles

23. Hexagon
A polygon with 6 sides and 6 angles

24. A polygon with 8 sides and 8 angles
Octagon
A polygon with 8 sides and 8 angles

25. Which term best describes the following figure?
An exact position or location
(a) point
(b) ray
(c) angle
(d) line

26. Which term best describes the following figure?
(a) rectangle
(b) rhombus
(c) parallelogram
(d) polygon

27. Which term best describes the following figure?
(a) acute angle
(b) right angle
(c) obtuse angle
(d) parallel lines

28. Which term best describes the following figure?
(a) point
(b) line
(c) line segment
(d) ray

29. Which term best describes the following figures?
(a) acute angles
(b) right angles
(c) obtuse angles
(d) intersecting lines

30. Which term best describes the following figure?
A figure made of two rays that share the same endpoint.
(a) angle
(b) line
(c) square
(d) polygon

31. Which term best describes the following figure?
Lines that never cross, they are always the same distance apart.
(a) intersecting lines
(b) parallel lines
(c) perpendicular lines
(d) angles

32. Which term best describes the following figure?
Lines that intersect to form right angles.
(a) intersecting lines
(b) parallel lines
(c) perpendicular lines
(d) angles

33. Which term best describes the following figure?
(a) quadrilateral
(b) pentagon
(c) hexagon
(d) octagon

34. Which term best describes the following figure?
(a) quadrilateral
(b) pentagon
(c) hexagon
(d) octagon

35. Which term best describes the following figure?
(a) parallelogram
(b) polygon
(c) rhombus
(d) trapezoid

36. Which term best describes the following figures?
(a) pentagons
(b) polygons
(c) rhombuses
(d) octagons

37. Which term best describes the following figures?
(a) equilateral triangles
(b) right triangles
(c) isosceles triangles
(d) quadrilaterals