Answer:
a=31.61
Step-by-step explanation:
Pythagorean theorem states that square hypotenuse side is equal to square opposite side plus square adjacent side
Hyp²= Opp²+Adj²
the opposite is represented by a in the question, so
60²=a²+51²
3600=a²+2601
combine the like terms
3600-2601=a²
999=a²
a²=999
square root both sides to remove the square
√a²=√999 {square cancels the square root
a=√999
a=31.606
a=31.61 approximately
