Circle Geometry Terminology

Front

What is the longest chord in a circle that goes through the center?

Back

Diameter

Front

What is a segment in a circle that has endpoints on the circle?

Back

Chord

Front

If AB = 18cm, what is the length of AR?

Back

9 cm

Front

If the circumference C = 40π cm, what is the radius?

Back

20 cm

Front

Identify a chord in a circle.

Back

RT

Front

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

Back

Radius

Front

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

Back

Arc

Front

What do you call a line segment that connects two points on a circle?

Back

Chord

Front

What is the formula for the circumference of a circle?

Back

C = 2πr

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius