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Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...

Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...

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10–2EXAMPLES Estimate the CircumferenceKEY CONCEPTEstimate the circumference of each circle.Circumference Thecircumference of a circleis equal to π times twiceits radius.C =Circumference of a circleC ≈ · Replace π with andd with .C ≈ m Multiply.C =Circumference of acircleC ≈ · · Replace π withand r with .C ≈ mm Multiply.Check Your Progress Estimate the circumference ofeach circle.a. diameter = 4 yd b. radius = 12 in.EXAMPLE Use a Calculator to Find CircumferenceUse a calculator to find the circumferenceof the circle. Round to the nearest tenth.C =Circumference ofa circleC = · · Replace r with 3.2 16 ENTER 18.8495559215The circumference is aboutyards.Copyright © Glencoe/<strong>McGraw</strong>-<strong>Hill</strong>, a division of The <strong>McGraw</strong>-<strong>Hill</strong> Companies, Inc.246 Math Connects, Course 1

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