Geometry Angles: Acute, Obtuse, Straight, Right Angle Pairs: Congruent, Vertical, Adjacent, Complementary and Supplementary Lines: Parallel, Perpendicular, Intersecting Triangles: Side Classification Angle Classification. Polygons Congruent Figures/Similar Figures Symmetry Circles Translation, Rotation, Reflection Basic Geometry Terms Point Line Ray Line Segment Angle Vertex Plane

Example: Point P .P POINT QUIZ Point – an exact location in space. It is ALWAYS named with a capital letter. Example: Point P .P

LINE Example: Line AB or AB A B QUIZ Line – a straight path of point that continues infinitely in two directions. A line is named by any two points on it. Example: Line AB or AB A B

Example: Line Segment EF, or EF E F LINE SEGMENT QUIZ Line segment- a part of a line that begins at one point and ends at another point. Example: Line Segment EF, or EF E F

RAY QUIZ Ray - this has one endpoint and continues infinitely in one direction. Example:  Ray CD, or CD   C D

ANGLE NAMES OF THE ANGLE QUIZ Angle – a figure formed by two rays that have the same end point. X Angle Y, angle XYZ, angle ZYX Y XYZ ZYX NAMES OF THE ANGLE Y Z

VERTEX QUIZ Vertex – An angle is named by its vertex or by three points with its vertex in the middle. Example: Z (Vertex ) Y X

PLANE QUIZ Plane – a flat surface. It continues in all directions. It is usually named with a small letter. Example: m Plane m

ANGLES QUIZ Straight Angle - this measures 180 Right Angles – this measures 90 Obtuse Angle - measures more than 90 but less than 180 Acute Angle - measures less than 90

LINES QUIZ Intersecting Lines – Lines that meet Perpendicular Lines – Lines that intersect and form right angles.  Parallel Lines – Lines in a plane that never intersect.

TRIANGLES QUIZ SIDE CLASSIFICATION Equilateral Isosceles Scalene - all three sides - two sides - none of the sides are equal. are equal are equal ANGLE CLASSIFICATION Acute Right Obtuse - all angles - one angle - one angle measure less than is 90 degrees measures 90 degrees more than 90 degrees

POLYGONS QUIZ Number of sides Name Picture 3 Triangle 4 Quadrilateral   4 Quadrilateral 5 Pentagon 6 Hexagon 7 Heptagon 8 Octagon 9 Nonagon 10 Decagon

CONGRUENT & SIMILAR FIGURES QUIZ Congruent Figures are EXACTLY the same size AND shape. Example: Rectangle A is = Rectangle B ~ Reminder: = means congruent ~ means similar to ~ A B Similar Figures are the shape, but different sizes. Example: Square C ~ Square D C D

SYMMETRY QUIZ A shape has symmetry when you can fold one half over the other half perfectly. Examples: These figures do not have any lines of symmetry:

CIRCLES QUIZ T U R V S W Name Definition Example Chord A line segment that has endpoints on the circle   TU Diameter A chord that passes through the center of a circle. It is twice the length of a radius. SV Radius A line segment that extends from the center to any point on the circle. It is half the size of a diameter RW Central angle An angle that has its vertex at the center of the circle. SRW V S W

. TRANSLATION ROTATION REFLECTION QUIZ Translation - when you slide the figure along a straight line. Reflection – when you flip the figure along a line of symmetry. The new figure is called a reflection. Rotation – you turn the figure on a curved path around a point. . Point of rotation

ANGLE PAIRS Congruent Angles: Same measure Vertical Angles: A pair of angles formed by intersecting lines. (Hint: Think of the angle on the opposite side.) 30 º 30 º MORE…

ANGLE PAIRS cont... Adjacent Angles – A pair of angles with a common vertex and a common side. (hint: they’re next to each other) Complimentary Angles: Angles that add up to 90º. Supplementary Angles: Angles that add up to 180 º. 60º 30º 100º 80º

Quiz More Questions What do you call a six sided polygon? Heptagon b. Hexagon c. Decagon d. quadrilateral What do you call a triangle with no equal sides? Scalene b. Obtuse c. Isosceles d. Equilateral An angle that measures 91 degrees is an __________ angle. Right b. Obtuse c. Straight d. Acute A ten sided polygon is called Tenagon b. Nonagon c. Polygon d. Decagon Which letter is the vertex in this angle? Angle PHY a. P b. H c. Y d. there is no vertex More Questions

Quiz Page 2 More Questions Two lines that will never meet are called: Parallel lines b. Perpendicular lines c. Intersecting lines Two lines that form right angles when they meet are called: a. Parallel lines b. Perpendicular lines c. Intersecting lines Two lines that cross but do not necessarily form right angles are called: What kind of a triangle has one obtuse angle and two acute angles? a. Acute triangle b. Obtuse triangle c. Right triangle More Questions

Quiz Page 3 More Questions What kind of triangle has three acute angles? Acute triangle b. Obtuse triangle c. Right triangle What kind of triangle has one right angle? When a figure can be folded in half perfectly this is called: Congruent b. Similar c. Symmetry d. Chord Two figures that are exactly the same shape and size are called: Two figures that are the same shape but different sizes are called More Questions

Quiz Page 4 A triangle has one angle that measures 45 degrees, another that measures 30, what is the third angle? 95 b. 5 c. 105 d. 75 In a circle the line that starts at the center and then stops at any point on the circle is called the Radius b. Diameter c. Chord d. Center In a circle the line that starts at one point on the circle, travels through the center and then to another point on a circle is called 18. In a circle the line that starts at one point on the circle and travels to another point on a circle is called a. Radius b. Diameter c. Chord d. Center

Quiz Page 5 A figure that starts at one point and stops at another is called a: Line segment b. Line c. ray d. Point A figure that starts at one point and then travels on forever in another direction is called: A figure that goes on forever in both directions is called a An exact location is called

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