Right triangle s1milarities

Question

The question states: Each pair of triangles is similar. Find the Perimeter of the given Triangle

Answer 1

(-5x + 4)/28 = 36/42 = 6/7

(-5x+4) = 24

5x = -20

x =-4

-5x+4 = -5(-4)+4 = 24

36-24 -26.8 has perimeter =86.8 feet

3rd side is sqr(36^2-24^2 = about 26.8

the 42-28-31.3 triangle has perimeter = 101.3 rounded off to one decimal

third side was sqr(42^2 - 28^2) = sqr980 = about 31.3