Area Sectors Circles Triangles Regular Polygons

What is the radius of a circle with an area of 49π?

• 49

• 10

• 7

• 14

A Circle has a radius of 4.  What is the circumference of the circle? (Best Choice)

• 4π or about 12.56

• 16π or about 50.24

• 2π or about 6.28

• 8π or about 25.12

A ____ angle is an angle whose vertex is a the center of a circle.

• supplementary

• complimentary

• central

• obtuse

What is the area formula for a circle?

• A = πr²

• A = 2πr

• A = √π

Find the area of the circle below.

• 8.76 cm²

• 18.52 cm²

• 21.90 cm²

• 28.26 cm²

What is this the formula for?

• arc length

• area of a sector

• area of a segment

• arc measure

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.

• 25.2 in²

• 28.5 in²

• 31.4 in²

• 38.2 in²

Find the area of the circle. When a number is written next to the center of the circle, it represents the diameter length. The diameter is 18 in.

• 56.52 in²

• 254.34 in²

• 1017.36 in²

• 113.04 in²

What is the area of the shaded SECTOR? Round to the nearest hundredth.

• 9.42 u²

• 113.10 u²

• 284.3 u²

• 452.39 u²

A area between/bounded by two radii of the circle and the arc where the radii meet the circle.

• triangle

• arc length of a circle

• sector of a circle

• segment of a circle