A wire is bent in the form of an equilateral triangle of side 5 cm.If the same wire is made into a regular pentagon find the measure of its side?

Dear student
We know that : Perimeter of equilateral triangle=3a, where a is the side of  equilateral triangleand  Perimeter of regular pentagon=5A, where A is the side of regular pentagonPerimeter of equilateral triangle=Perimeter of regular pentagon3×5=5×A3 cm=A 
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3 cm
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