Parts of a Circle

Front

What is the definition of a circle?

Back

A circle is a set of points in a plane that are equidistant from a fixed point called the center.

Front

What is the diameter of a circle?

Back

The diameter is the longest distance across the circle, passing through the center, and is twice the length of the radius.

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 a chord in a circle?

Back

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

Front

What is an arc in a circle?

Back

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

Front

What is a minor arc?

Back

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

Front

What is a major arc?

Back

A major arc is an arc that is larger than a semicircle.

Front

How do you calculate the circumference of a circle?

Back

The circumference can be calculated using the formula C = 2πr, where r is the radius.

Front

What is the relationship between diameter and radius?

Back

The diameter is equal to twice the radius (d = 2r).

Front

What is the formula for the area of a circle?

Back

The area of a circle can be calculated using the formula A = πr², where r is the radius.