Respuesta :

14. Perimeter of square is 4(x+5)=4x+20.
Perimeter of triangle is 9x.
So 9x=4x+20, 5x=20, x=4.
Sides of the triangle are 3x=12 each.
15. Multiply through by 3: 3V=Bh, divide through by h: 3V/h=B, so B=3V/h.