Calculating Circumference

Find the circumference, round your answer to 1decimal place (the tenth)

• 25.1cm

• 12.5cm

• 12.6cm

• 6.3cm

Find the circumference of a circle with a diameter of 18.

• not here

• 54

• 48

• 36

Find the circumference of a circle with a diameter of 12.

• 144

• 36

• not here

• 108

Find the circumference of a circle with a diameter of 16.

• 8

• 48

• 32

• not here

How does a circumference compare to the diameter of a circle?

• The circumference is about three times the size of the diameter.

• The circumference is about half the size of the diameter.

• The diameter is about two times the size of the circumference.

• They are the same.

Calculate the circumference of a circle with a radius of 8 cm. (Use π = 3.14)

• 50.24 cm

• 40.24 cm

• 60.24 cm

• 45.24 cm

What is the formula for finding the circumference of a circle?

• 2 * π * d

• π * r^2

• 2 * r

• 2 * π * r

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

• 25.4 cm

• 10.5 cm

• 31.4 cm

• 15.7 cm

What is the circumference of a circle with a diameter of 12 cm? (Use π = 3.14)

• 44.52 cm

• 37.68 cm

• 30.24 cm

• 25.36 cm

How is the circumference of a circle related to its diameter?

• The circumference of a circle is half of its diameter.

• The circumference of a circle is unrelated to its diameter.

• The circumference of a circle is equal to π times its diameter.

• The circumference of a circle is equal to its radius.