Parts of a Circle and Circumference Review

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle.

Front

If the radius of a circle is 9 cm, what is the diameter?

Back

18 cm (Diameter = 2 x Radius).

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is a minor arc?

Back

A minor arc is an arc that is smaller than a semicircle.

Front

What is a secant?

Back

A secant is a line that intersects a circle at two points.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What does 'circumference' mean?

Back

Circumference means the distance around a circle.

Front

If the diameter of a circle is 10 cm, what is the radius?

Back

5 cm (Radius = Diameter / 2).