Circle Logic!

The Radius is the distance from the BLANK to the BLANK

• Center Point, Perimeter

• Perimeter, Opposite Side

• Opposite Side, Center Point

The Diameter is BLANK the Radius

• Half

• Double

• Triple

• Quadruple

The formula for circumference is:

• C = 2πr

• C = 2πd

• C = πr²

• C = πd²

If we're given the diameter, what step can we do to calculate the circumference?

• Divide by 2

• Divide by π

• Multiply by π

• Multiply by 2

What is the circumference if the radius = 3?

• 6.28

• 12.56

• 18.84

• 25.12

What is the circumference if the radius = 5?

• 31.4

• 43.96

• 18.84

• 25.12

What is the circumference if the radius = 7?

• 31.4

• 50.24

• 43.96

• 62.8

What is the circumference if the radius = 11?

• 69.08

• 81.64

• 75.36

• 62.8

What is the circumference if the radius = 15?

• 81.64

• 94.2

• 75.36

• 106.76

What is the circumference if the radius = 18?

• 113.04

• 125.6

• 119.32

• 106.76