Circles

Front

What is a circle?

Back

A circle is a shape consisting of all points in a plane that are at a given distance from a fixed point, called the center.

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

Front

What is an arc in a circle?

Back

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

Front

What is a chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.

Front

What is a sector of a circle?

Back

A sector is a region enclosed by two radii and the arc between them.

Front

What is the relationship between diameter and radius?

Back

Front

How do you calculate the length of an arc?

Back

Front

What is the formula for the area of a circle?

Back