Circles Review

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 formula for the circumference of a circle?

Back

The circumference C of a circle is given by the formula C = 2πr, where r is the radius.

Front

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

Back

The diameter d of a circle is twice the radius r, so d = 2r.

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 tangent to a circle?

Back

A tangent is a line that touches the circle at exactly one point.

Front

What is the measure of a central angle in a circle?

Back

A central angle is the angle whose vertex is at the center of the circle and whose sides are radii.

Front

What is the measure of an inscribed angle in a circle?

Back

An inscribed angle is half the measure of the intercepted arc.

Front

What is the formula for the area of a circle?

Back

The area A of a circle is given by the formula A = πr^2, where r is the radius.

Front

What is a minor arc in a circle?

Back

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

Front

What is a major arc in a circle?

Back

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