Area and Circumference Geometry

Daniel wants to buy cookies for her friend. The
radius of a cookie is 5 inches. What is the distance around the cookie?

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in 

Find the area of the semicircle. Round you answer to the nearest hundredth.

• 18.84

• 9.42

• 56.52

• 113.04

Find the area of the three-quarter circle. Round you answer to the nearest hundredth.

• 314.00

• 235.50

• 58.88

• 47.10

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 area and circumference of the circle with an 18 inch diameter. Round to the nearest tenth. Area = ​ (a)   Circumference = ​ ​ (b)  

• 1017.9

• 113.1

• 112.9

• 1087.3

• 987.3

• 114.6

• 25.12 inches

• 12.56 inches

• 50.24 inches

• 31.4 inches

The area of a circle is 113.04 cm.

The diameter of the circle is ​ (a)  

The radius of the circle is ​ (b)  

• 6 cm

• 12 cm

• 36 cm

• 18 cm

• 9 cm

• 3 cm

• 72 cm

• 24 cm

A circle pool has a radius of 7.5 ft. Monica wants to know how many ft of a pool cover she needs to buy? (a)  

• 23.55 ft²

• 176.63 ft²

• 47.1 ft²

• 706.5 ft²

Mathematical Equivalence

ON

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