Answer:
the answer is 9
Step-by-step explanation:
SA=2(3)(3)+(3)(3)+(3)(3)
Explanation: the formula for SA for a rectangular prism is SA=2(wl+hl+hw)
A^2 + b^2 = c^2
132^2 + b^2 = 157^2
17424 + b^2 = 24,649
b^2 = 24,649 - 17424
b^2 = 7225
b = square root 7225
b = 85 <== the missing leg is 85 units
Lauras step is correct...she rearranged the formula making it :
b^2 = c^2 - a^2.....and subbed in numbers correctly. She just didn't finish