Let's call the longest side x. One side of the triangle is x/2, or 0.5x One side of the triangle is x - 8 And the third side would then be x
If we know the perimeter is 47, then we know that all of these sides add together to make 47, so we can solve for x: 0.5x + x + x - 8 = 47 2.5x - 8 = 47 + 8 2.5x = 55 ÷ 2.5 x = 22
So now that we know x, we can just substitute it in to the sides. Side 1: 0.5 × 22 = 11 Side 2: 22 - 8 = 14 Side 3: And of course x is just 22
