Which equation can be used to find the unknown length, b, in this triangle?A right triangle has a side with length 4 inches and hypotenuse with length 5 inches. The other side is labeled b.4 squa + b squa = 5 squa4 squa minus b squa = 5 squa5 squa + 4 squa = b squa5 squa + b squa = 4 squa