π REVIEW

1. Pi, or π , is the ratio of the ___________________ of a circle to the

_________________________ of a circle.

π = Circumference__

Diameter

2. The value of π = _____________.

NOTE: For hundreds of years, mathematicians have tried to find the exact value of π

. Recently electronic computers have worked out the ratio to thousands of decimal

places and it still didn't "come out even."

Sometimes the value used is 3.14; sometimes 3 1/7 or 22/7. For most ordinary

computations, 3.14 is accurate enough.

ANSWERS TO REVIEW

1. circumference

diameter

2. 3.14

TURN TO PAGE 21

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