Parts of A Circle, Diameter, Radius Part B

Front

What is the diameter of a circle?

Back

The diameter is the longest distance across a circle, passing through the center. It 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 the center of a circle?

Back

The center is the point that is equidistant from all points on the circumference of 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 an arc in a circle?

Back

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

Front

How do you calculate the diameter if the radius is known?

Back

Diameter = 2 x Radius.

Front

How do you calculate the radius if the diameter is known?

Back

Radius = Diameter / 2.

Front

What is the relationship between diameter and circumference?

Back

Circumference = π x Diameter.

Front

What is the formula for the area of a circle?

Back

Area = π x (Radius)^2.