Review Activity: Arcs, Sectors, and Angles

Front

What is the definition of a central angle?

Back

An angle in a circle with its vertex at the center of the circle.

Front

What is a radius in a circle?

Back

A line segment from the center of the circle to any point on the circle.

Front

Identify the segment that is not a radius: CA, CB, CD, LM.

Back

LM is not a radius.

Front

What is the formula to find the measure of an inscribed angle?

Back

The measure of an inscribed angle is half the measure of the intercepted arc.

Front

If the measure of an arc is 120°, what is the measure of the central angle that intercepts it?

Back

The measure of the central angle is also 120°.

Front

What is the relationship between the angles formed by two intersecting chords in a circle?

Back

The measure of each angle is half the sum of the measures of the arcs intercepted by the angle and its vertical angle.

Front

Solve for x: 2x + 10 = 50.

Back

x = 20.

Front

Find the measure of the angle if the intercepted arc is 80°.

Back

The inscribed angle is 40°.

Front

What is the definition of an inscribed angle?

Back

An angle formed by two chords in a circle which have a common endpoint.

Front

If the radius of a circle is 5 cm, what is the diameter?

Back

The diameter is 10 cm.