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Find the perimeter of this semi-circle with radius, r = 45cm.

Give your answer as an expression in terms of pi

User Kelsheikh
by
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1 Answer

5 votes

Answer:

45*pi

Explanation:

Perimeter (circumference) =2*pi*R

For sine circle = 1/2*2*pi*R=pi*R=45*pi

User Thomas Gassmann
by
8.7k points

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