Geometry Vocab

Front

Two rays with a common endpoint form an angle, named using the rays and vertex.

Back

angle

Front

Surface measured in sq. units

Back

area

Front

Point from which all points on a circle are equidistant

Back

center

Front

Distance around a circle

Back

circumference

Front

Distance across a circle through its center

Back

diameter

Front

In a polygon, all sides are congruent.

Back

equilateral

Front

Lines in a plane that never intersect

Back

parallel lines

Front

Distance around a figure

Back

perimeter

Front

Lines that meet or cross to form right angles

Back

perpendicular lines

Front

Circumference to diameter ratio of a circle

Back

Pi