Parts of a circle

Front

What is the diameter of a circle?

Back

The diameter is the distance across a circle through its center, and it is twice the length of the radius.

Front

What do we call a chord that passes through the center of the circle?

Back

A chord that passes through the center of the circle is called the diameter.

Front

What is the relationship between the radius and the diameter?

Back

The radius is half the diameter.

Front

If the radius of a circle is 4, what is the diameter?

Back

The diameter is 8, since diameter = 2 × radius.

Front

What is the circumference of a circle?

Back

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 an arc in a circle?

Back

An arc is a part of the circumference of a circle.

Front

What is the area of a circle?

Back

Front

What is a chord in a circle?

Back

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

Front

What is the relationship between the diameter and the circumference?

Back