Circle Arc Angle

In circle O, the radius is 4, and the measure of minor arc AB is 120 degrees. Find the length of minor arc AB to the nearest integer.

• 5

• 9

• 8

• 6

Find the area of the shaded sector of circle O.  The radius is 6 inches and the central angle is 100°.  Express answer to the nearest tenth of a square inch.

• 9.2 sq. in.

• 10.5 sq. in.

• 31.4 sq. in.

• 38.2 sq. in.

FIND THE SECTOR AREA OUTLINED IN BOLD

• A

• B

• C

• D

• A

• B

• C

• D

• A
• B
• C
• D

What is m∠ACB?

• 67.5°

• 90°

• 22.5°

• 45°

What is the measure of arc AD?

• 38

• 142

• 180

• 153

The set of all points equidistant (equal distance) from a point.

• arc

• central angle

• circle

• semicircle

An angle whose vertex is the center of a circle

• central angle

• inscribed angle

• minor arc

• major arc

How many degrees are in a circle?

• 90

• 180

• 270

• 360