Circle Unit Vocabulary

Front

What is the distance between two points of a circle?

Back

Diameter

Front

What is the angle whose vertex is the center of the circle?

Back

Central angle

Front

What is the distance from the center of a circle to a point on the circle?

Back

Radius

Front

What is a fraction of the area of a circle called?

Back

Sector area

Front

What is a fraction of the circumference called?

Back

Arc length

Front

What is the term for a part of the circle's circumference?

Back

Arc

Front

What do you call a line segment that passes through the center of the circle and has endpoints on the circle?

Back

Diameter

Front

What is the term for the area enclosed by two radii and an arc?

Back

Sector

Front

What is the term for an angle formed by two chords in a circle?

Back

Inscribed angle

Front

What is the term for the longest chord in a circle?

Back

Diameter