You want to isolate b, so start by multiplying the whole equation by three to get rid of it in the denominator:
(v=1/3 bh)3
3v=bh
Then to isolate b divide the whole equation by h:
(3v=bh)/h
3v/h=b
Suppose the shorter leg is x, then the longer leg is x+3, and the hypotenuse is x+6
x^2 +(x+3)^2 =(x+6)^2
x^2 + x^2 + 6x +9=x^2 + 12x +36
x^2-6x-27=0
(x+3)(3-9)=0
x=-3, which is impossible, or x=9
so the shorter leg is 9mm, the longer leg is 12mm, and the hypotenuse is 15mm
It would be c because 1 cm. is equal to 10 mm
216 yards.
Hope this helped!
