Flashcard--Angles of Circles

Front

What is the measure of angle V if the options are 85, 80, 87, 117?

Back

80

Front

What is m∠ACB if the options are 67.5°, 90°, 22.5°, 45°?

Back

22.5°

Front

What is the measure of arc QR if the options are 106, 85, 113, 78?

Back

78

Front

To find an angle inside the circle, which formula do you use? (1/2)arc, (1/2)(arc+arc), (1/2)(arc - arc), I don't know

Back

(1/2)(arc+arc)

Front

What is an angle in a circle with vertex on the center of the circle called?

Back

Central angle

Front

Define a central angle.

Back

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

Front

What is an inscribed angle?

Back

An angle formed by two chords in a circle which have a common 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 a central angle and its intercepted arc?

Back

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

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.