Arcs & Inscribed Angles

Front

What is an arc in a circle?

Back

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

Front

How do you find the measure of an arc?

Back

The measure of an arc is determined by the central angle that subtends it.

Front

What is the relationship between congruent arcs and chords?

Back

Congruent arcs have congruent chords.

Front

What is the measure of a semicircle?

Back

The measure of a semicircle is 180 degrees.

Front

If two arcs are congruent, what can be said about their central angles?

Back

Their central angles are also congruent.

Front

What is an inscribed angle?

Back

An inscribed angle is formed by two chords in a circle which share an endpoint.

Front

How do you calculate the measure of an inscribed angle?

Back

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

Front

What is the relationship between an inscribed angle and its intercepted arc?

Back

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

Front

If the measure of arc AB is 68 degrees, what is the measure of the inscribed angle that intercepts arc AB?

Back

34 degrees.

Front

What is the measure of arc DC if the central angle is 122 degrees?

Back

122 degrees.