Circumference Challenge PVo

What is the formula to find the circumference of a circle?

• 2 * r

• π * r^2

• 2 * π * r

• π * r

If the radius of a circle is 5 cm, what is its circumference? (Use π = 3.14)

• 25 cm

• 15.7 cm

• 31.4 cm

• 10 cm

What is the circumference of a circle with a diameter of 14 cm? (Use π = 3.14)

• 36.78 cm

• 50.24 cm

• 28.26 cm

• 43.96 cm

If the circumference of a circle is 31.4 cm, what is its radius? (Use π = 3.14)

• 7 cm

• 5 cm

• 10 cm

• 3 cm

What is the value of π (pi)?

• 3.14159

• 1.61803

• 4.66920

• 2.71828

If the diameter of a circle is 12 cm, what is its circumference? (Use π = 3.14)

• 24.56 cm

• 40.82 cm

• 15.72 cm

• 37.68 cm

What is the radius of a circle if its circumference is 18.84 cm? (Use π = 3.14)

• 5 cm

• 7 cm

• 10 cm

• 3 cm

If the circumference of a circle is 25.12 cm, what is its diameter? (Use π = 3.14)

• 6 cm

• 8 cm

• 10 cm

• 12 cm

What is the circumference of a circle with a radius of 8 cm? (Use π = 3.14)

• 16.28 cm

• 50.24 cm

• 64.28 cm

• 40.24 cm

If the circumference of a circle is 62.8 cm, what is its diameter? (Use π = 3.14)

• 25 cm

• 20 cm

• 30 cm

• 15 cm