Pearson Geometry Common Core, 2011
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Pearson Geometry Common Core, 2011 View details
8. Perimeter, Circumference, and Area
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Exercise 10 Page 64

Use that C=Ď€ d to find the circumference.

15Ď€cm

Practice makes perfect
The circumference of a circle can be found by multiplying the diameter by π. C= π d We know that this circle has a diameter of 15 centimeters, so we can substitute 15 for d in the formula.
C=Ď€ d
C=Ď€* 15
C=15Ď€
The circumference is 15Ď€ centimeters.