Central angles and arcs

Front

How do we name a major arc?

Back

With the two endpoints and another middle point.

Front

Name a semicircle.

Back

ABD.

Front

Name a major arc.

Back

BDA.

Front

What is the measure of arc WXZ if it is given as 231?

Back

231.

Front

If the measure of arc ABC = 210°, what is the measure of arc AC?

Back

150°.

Front

Define a central angle.

Back

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

Front

What is the relationship between a central angle and its intercepted arc?

Back

The measure of a central angle is equal to the measure of its intercepted arc.

Front

How do you calculate the measure of a minor arc?

Back

The measure of a minor arc is equal to the measure of the central angle that intercepts it.

Front

What is a semicircle?

Back

A semicircle is an arc that measures 180° and is formed by a diameter.

Front

How do you name a minor arc?

Back

With the two endpoints only.