each side of an equilateral triangle is 4 cm shorter than twice the length of each side of a square. their perimeter are the same. how long is each side of the triangle?

Answer 1

let s = side of triangle
let q = side of square
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s+4 = 2q (equation 1)
perimeters equal so
s+s+s+s = q+q+q+q or
4s = 4q (equation 2)
Solve the two equations simultaneously for s and q.