Question

Two sides of a triangle have the same length. The third side measures 4 m less than twice that length. The perimeter of the triangle is 20m. Find the lengths of the sides.

Answer 1

let the unknown side be 'x'

Explanation:

then sides of triangle became 'x', 'x,'and 'x-4'

we know,

perimeter =(x)+(x)+(x-4)

20 m =3x-4

3x= 24

x =8m

hence sides of triangle are 8 m, 8m and 4m