Area, Circumference, Diameter, Radius

If the diameter of a circle is 18.5 inches, what is the circumference?

• 58.09 inches

• 1074.67 inches

• 116.18 inches

• 58.09 centimeters

If the radius of a circle is 4, what is the circumference?

• 8

• 25.12

• 50.24

• 12.56

Find the circumference of a circle with a radius of 15.

• 30

• 225

• 706.5

• 94.2

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

Sally has car tire with a circumference of 75.36 ft. What is the radius of the car tire and what is the diameter? (Use 3.14 for pi)

• r=12 ft

• d=26 ft

• r=13 ft

• d=24 ft

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

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

If my circumference is 37.68cm, what is my diameter?

• 12 cm

• 118.3152 cm

• 6 cm

• 37.68 cm

If the radius of a circle is 15, what is the diameter?

• 7.5

• 30

• 15

• 29

A round breakfast table has a diameter of 5 meters. How much table cloth is needed to cover the entire table?

• 15.7 m

• 19.625 m

• 78.5

• 7.85 m