Circumference and Area of Circles

Multiple Choice

A circle is

• a set of all points in a plane that are the same distance from a center point

• the distance around a share

• a round figure with no straight sides

• the earth, a basketball, a bubble, or a watermelon

Match

Match the following

• radius

• diameter

• circumference

• $$\pi$$

dist. from center to any pt. on circle

distance across circle through center

distance around a circle

circumference divided by the diameter

• dist. from center to any pt. on circle

• distance across circle through center

• distance around a circle

• circumference divided by the diameter

Math Response

Give the diameter of the circle in feet.

Type answer here

Correct Answer: 23.8

Deg^°

Rad

Math Response

Give the radius of the circle in centimeters.

Type answer here

Correct Answer: 4.3

Deg^°

Rad

Multiple Choice

$$C=\pi d$$

Give the circumference of the circle. Use 3.14 for the value of π.

• 628 feet

• 31.4 feet

• 62.8 feet

• 19.9 feet

Multiple Choice

$$C=\pi d$$

Give the circumference of the circle. Use 3.14 for the value of π.

• 55.9 in

• 61.6 in

• 62.2 in

• 28 in

Math Response

$$C=\pi d$$

Give the circumference of the circle. Use 3.14 for the value of π. Round your answer to the nearest tenth.

Type answer here

Correct Answer: 43.3

Deg^°

Rad

Math Response

$$C=\pi d$$

Give the circumference of the circle. Use 3.14 for the value of π. Round your answer to the nearest tenth.

Type answer here

Correct Answer: 29.5

Deg^°

Rad

Math Response

$$C=\pi d$$

Give the circumference of the circle with a radius of 6.7 feet. Use 3.14 for the value of π. Round your answer to the nearest tenth.

Type answer here

Correct Answer: 42.1

Deg^°

Rad

Math Response

$$C=\pi d$$

Give the circumference of the circle with a diameter of 22 cm. Use 3.14 for the value of π. Round your answer to the nearest tenth.

Type answer here

Correct Answer: 69.1

Deg^°

Rad

Multiple Choice

$$A=\pi r^2$$

Find the area of the circle. Use 3.14 for the value of π.

• 379.9 cm^2

• 45963.1 cm^2

• 34.5 cm^2

• 95 cm^2

Multiple Choice

$$A=\pi r^2$$

Find the area of the circle. Use 3.14 for the value of π.

• 78.5 cm^2

• 98.5 cm^2

• 102 cm^2

• 113 cm^2

Math Response

$$A=\pi r^2$$

Find the area of the circle with a radius of 5 cm. Use 3.14 for the value of π. Round your answer to the nearest tenth.

Type answer here

Correct Answer: 78.5

Deg^°

Rad

Math Response

$$A=\pi r^2$$

Find the area of the circle with a diameter of 24 m. Use 3.14 for the value of π. Round your answer to the nearest tenth.

Type answer here

Correct Answer: 452.2

Deg^°

Rad