Chapter 9 Vocabulary-Geometric Shapes & Angles

Front

the set of all points in a plane that are the same distance from a point called the center

Back

circle

Front

the distance from the center to any point on the circle

Back

radius

Front

the distance across the circle through the center

Back

diameter

Front

the distance around a circle

Back

circumference

Front

one-half of a circle

Back

semicircle

Front

made up of triangles, squares, rectangles, semicircles, and other two-dimensional figures

Back

composite figure

Front

Two angles that share a common side and have the same vertex

Back

adjacent angles

Front

Two angles that have a sum of 90°

Back

complementary angles

Front

Two angles that have a sum of 180°

Back

supplementary angles

Front

Two angles that are opposite angles formed by the intersection of two lines

Back

vertical angles