Exploring the Circumference of a Circle Formula

What is the formula for the circumference of a circle?

• C = πr^2

• C = 2πr

• C = 2r

• C = πd

How is π defined in relation to a circle?

• The ratio of the radius to the diameter

• The ratio of the circumference to the radius

• The ratio of the diameter to the circumference

• The ratio of the circumference to the diameter

What does the diameter of a circle equal to?

• π times the circumference

• Half the circumference

• Twice the radius

• π times the radius

What does π equal when expressed in terms of circumference and radius?

• Circumference divided by radius

• Circumference divided by 2r

• Diameter divided by circumference

• Radius divided by circumference

How do we solve for the circumference of a circle using π and r?

• Multiply π by the diameter

• Divide the diameter by π

• Divide 2r by π

• Multiply 2π by the radius