9. A circular shaped wire with diameter 42 cm was straightened out and bent into the shape of an equilateral triangle find the length of each side of the triangles in meters
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Length of wire = circumference of circle
=2πr
=2×22÷7×42=264 cm
Length of wire = Perimeter of square
264=4a
So a= 4÷264
=66 cm
Side of =66 cm
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