Question

a wire is shaped in the form of a circle of radius 21 cm.it is rebent into the shape of an equilateral triangle.each side of the triangle is

Answer 1

each side of the triangle is 44 cm

Answer 2

radius = 21cm

circumference = 2πr

$= 2 \times \frac{22}{7} \times 21$

= 132cm

since all the sides of an equilateral triangle are equal,

perimeter of an equilateral triangle = 3 × side

let the side be ' s '

132 = 3 × s

$\frac{132}{3} = s$

s = 44

side of the equilateral triangle is 44cm