Circle Vocabulary

Front

What is the longest chord in a circle called?

Back

Diameter

Front

What do you call a part of the circumference of a circle?

Back

Arc

Front

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

Back

Radius

Front

What is a line that touches a circle at exactly one point called?

Back

Tangent Line

Front

What is a line that intersects a circle at two points called?

Back

Secant

Front

What is the total distance around a circle called?

Back

Circumference

Front

What do you call an arc that is less than half of the circle?

Back

Minor Arc

Front

What do you call an arc that is more than half of the circle?

Back

Major Arc

Front

What is a segment that connects two points on the circumference of a circle called?

Back

Chord

Front

What is the formula for the circumference of a circle?

Back

C = 2πr or C = πd