Question

The perimeter of an isosceles triangle is 30cm. Find x? *Underneath the triangle is 5cm

Answer 1

Assumption: `x` is the length of each of the other two sides.

`x= 12.5color(white)(".") cm`

Explanation:

The full length of the perimeter is `5+x+xcolor(white)("ddd") -> color(white)("ddd") 5+2x`

So we are given that `5+2x=30 cm`

Subtract 5 cm from both sides

`2x=25cm`

Divide both sides by 2

`x=12 1/2 cm color(white)("d")->color(white)("d")12.5 cm`