Circles

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 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 a line segment that passes through the center of the circle and has endpoints on the circle. It is twice the length of the radius.

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 the radius and diameter of a circle?

Back

The diameter is twice the length of the radius (D = 2r).

Front

What is an arc in a circle?

Back

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

Front

What is the measure of an arc?

Back

The measure of an arc is the angle subtended by the arc at the center of the circle, usually measured in degrees.

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.

Front

What is the relationship between the circumference and radius of a circle?

Back

The circumference is directly proportional to the radius, given by the formula C = 2πr.

Front

What is a sector in a circle?

Back

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