Circle Unit Vocabulary

Front

an arc of a circle that is greater than 180⁰

Back

major arc

Front

a fraction of the area of a circle

Back

sector area

Front

an arc of a circle that is less than 180⁰

Back

minor arc

Front

a fraction of the circumference

Back

arc length

Front

A line segment whose endpoints are on the circle

Back

chord

Front

A line that touches a circle at exactly one point

Back

tangent

Front

A line that intersects a circle at two points

Back

secant

Front

The distance around a circle

Back

circumference

Front

The distance from the center of a circle to any point on the circle

Back

radius

Front

The distance across a circle through its center

Back

diameter