## Perimeter of circle questions and answers

What is the approximate perimeter of a circle with a radius of 5 units? (Use π = 3.14)

A) 15.7 units

B) 31.4 units

C) 10 units

D) 25 units

Answer: B) 31.4 units

The diameter of a circle is 8 units. What is the exact perimeter of the circle? (Use π = 3.14)

A) 16π units

B) 24π units

C) 32π units

D) 4π units

Answer: B) 24π units

What is the approximate perimeter of a circle with a circumference of 25 units? (Use π = 3.14)

A) 7.96 units

B) 9.42 units

C) 25 units

D) 78.5 units

Answer: C) 25 units

The radius of a circle is tripled. How does the perimeter of the circle change?

A) It becomes three times the original perimeter.

B) It becomes six times the original perimeter.

C) It becomes double the original perimeter.

D) It becomes half the original perimeter.

Answer: C) It becomes double the original perimeter.

The circumference of a circle is 20π units. What is the exact perimeter of the circle?

A) 20 units

B) 40 units

C) 60 units

D) 20π units

Answer: C) 60 units

The radius of a circular garden is 6 meters. What is the approximate perimeter of the garden? (Use π = 3.14)

A) 18.84 meters

B) 37.68 meters

C) 12 meters

D) 37.68π meters

Answer: B) 37.68 meters

The diameter of a circle is 10 centimeters. What is the approximate perimeter of the circle? (Use π = 3.14)

A) 10 centimeters

B) 20 centimeters

C) 31.4 centimeters

D) 62.8 centimeters

Answer: C) 31.4 centimeters

The circumference of a circular track is 400 meters. What is the approximate perimeter of the track?

A) 400 meters

B) 200 meters

C) 100 meters

D) 800 meters

Answer: A) 400 meters

The radius of a circle is 12 centimeters. What is the exact perimeter of the circle? (Use π = 3.14)

A) 12 centimeters

B) 24 centimeters

C) 75.36 centimeters

D) 37.68 centimeters

Answer: C) 75.36 centimeters

The circumference of a circle is 2π units. What is the exact perimeter of the circle?

A) 2 units

B) 4 units

C) 2π units

D) 4π units

Answer: B) 4 units

The radius of a circular plate is 5 inches. What is the approximate perimeter of the plate? (Use π = 3.14)

A) 10 inches

B) 31.4 inches

C) 15.7 inches

D) 25 inches

Answer: B) 31.4 inches

The diameter of a circle is 12 centimeters. What is the approximate perimeter of the circle? (Use π = 3.14)

A) 6 centimeters

B) 12 centimeters

C) 24 centimeters

D) 37.68 centimeters

Answer: C) 24 centimeters

The circumference of a circular swimming pool is 50 meters. What is the approximate perimeter of the pool?

A) 50 meters

B) 100 meters

C) 25 meters

D) 150 meters

Answer: A) 50 meters

The radius of a circle is doubled. How does the perimeter of the circle change?

A) It becomes double the original perimeter.

B) It becomes four times the original perimeter.

C) It becomes half the original perimeter.

D) It remains the same.

Answer: B) It becomes four times the original perimeter.

The circumference of a circle is 10π units. What is the exact perimeter of the circle?

A) 10 units

B) 20 units

C) 30 units

D) 10π units

Answer: B) 20 units

The radius of a circular garden is 8 meters. What is the approximate perimeter of the garden? (Use π = 3.14)

A) 25.12 meters

B) 50.24 meters

C) 16 meters

D) 50.24π meters

Answer: B) 50.24 meters

The diameter of a circle is 16 centimeters. What is the approximate perimeter of the circle? (Use π = 3.14)

A) 16 centimeters

B) 32 centimeters

C) 100.48 centimeters

D) 50.24 centimeters

Answer: B) 32 centimeters

The circumference of a circular track is 800 meters. What is the approximate perimeter of the track?

A) 800 meters

B) 400 meters

C) 200 meters

D) 1600 meters

Answer: A) 800 meters

The radius of a circle is 15 centimeters. What is the exact perimeter of the circle? (Use π = 3.14)

A) 15 centimeters

B) 30 centimeters

C) 94.2 centimeters

D) 47.1 centimeters

Answer: B) 30 centimeters

The circumference of a circle is 4π units. What is the exact perimeter of the circle?

A) 4 units

B) 8 units

C) 4π units

D) 8π units

Answer: B) 8 units

The radius of a circular plate is 7 inches. What is the approximate perimeter of the plate? (Use π = 3.14)

A) 14 inches

B) 43.96 inches

C) 21.98 inches

D) 31.4 inches

Answer: B) 43.96 inches

The diameter of a circle is 14 centimeters. What is the approximate perimeter of the circle? (Use π = 3.14)

A) 7 centimeters

B) 14 centimeters

C) 44 centimeters

D) 69.44 centimeters

Answer: C) 44 centimeters

The circumference of a circular swimming pool is 100 meters. What is the approximate perimeter of the pool?

A) 100 meters

B) 200 meters

C) 50 meters

D) 314 meters

Answer: A) 100 meters

The radius of a circle is halved. How does the perimeter of the circle change?

A) It becomes half the original perimeter.

B) It becomes one-fourth the original perimeter.

C) It becomes double the original perimeter.

D) It remains the same.

Answer: A) It becomes half the original perimeter.

The circumference of a circle is 8π units. What is the exact perimeter of the circle?

A) 8 units

B) 16 units

C) 24 units

D) 8π units

Answer: B) 16 units

The radius of a circular garden is 10 meters. What is the approximate perimeter of the garden? (Use π = 3.14)

A) 31.4 meters

B) 62.8 meters

C) 20 meters

D) 62.8π meters

Answer: B) 62.8 meters

The diameter of a circle is 20 centimeters. What is the approximate perimeter of the circle? (Use π = 3.14)

A) 20 centimeters

B) 40 centimeters

C) 62.8 centimeters

D) 125.6 centimeters

Answer: B) 40 centimeters

The circumference of a circular track is 1600 meters. What is the approximate perimeter of the track?

A) 1600 meters

B) 800 meters

C) 400 meters

D) 3200 meters

Answer: A) 1600 meters

The radius of a circle is 18 centimeters. What is the exact perimeter of the circle? (Use π = 3.14)

A) 18 centimeters

B) 36 centimeters

C) 113.04 centimeters

D) 56.52 centimeters

Answer: B) 36 centimeters

The circumference of a circle is 6π units. What is the exact perimeter of the circle?

A) 6 units

B) 12 units

C) 18 units

D) 12π units

Answer: B) 12 units