Question

A wire is bent to form semi circles as shown below. How long is the wire? Use 3.14 for pi and round your answer to the nearest hundredth if necessary

4 semi circles and the diameter is 41

Answer 1

Answer: 257.48 cm

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Step-by-step explanation

Those 4 semicircles can be joined to form 4/2 = 2 full circles.

Each circle has diameter 41 cm.

Let's find the circumference of one circle

C = circumference, d = diameter = 41, pi = 3.14

C = pi*d

C = 3.14*41

C = 128.74

That's the perimeter of one full circle. Double it to get

2*128.74 = 257.48 cm

Which is the total length of the wire.