Finding the Diameter

Sep 06, 2014

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Finding the Diameter. C = Ï€ d. Circumference Formula:. What if we know the circumference and want to find the diameter?. Rearrange the formula for d:. d = C. Ï€. d = C. Ï€. d = 40. 3.14. EXAMPLE 1. A circle has a circumference of 40 centimeters. Calculate its diameter. 40 cm.

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Finding the Diameter

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Finding the Diameter
C =πd Circumference Formula: What if we know the circumference and want to find the diameter? Rearrange the formula for d: d =C π
d = C π d = 40 3.14 EXAMPLE 1 A circle has a circumference of 40 centimeters. Calculate its diameter. 40 cm ? cm d = 12.7 cm to 1 dp
d = C π d = 56 3.14 NOW DO PAGE 121 Ex. 2 EXAMPLE 2 A circle has a circumference of 14 cm. Find its radius. 56 cm ? cm d = 17.8 cm to 1 dp r= 8.9 cm to 1 dp