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The circumference of a circle of radius r is given by the polynomial 2 pi r2πr​, where piπ is an irrational number. For an approximation of piπ​, use 3.14. Find the circumference of a circle with radius 18 cm18 cm.

User Janet
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To find the circumference you use c = pi d. Radius * 2 = Diameter
c = 3.14(36)
c = 113.04 in. square.
User Shameen
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