Answer:
answer is 57.1
Explanation:
2(3 x 4) = 24 /// (3 x 5.7) = 17.1 /// 2.85^2 + b^2 = 4^2 ----> 8.1225 + b^2 = 16 ----> b^2 = 7.8775 ----> sqr b^2 = sqr 7.8775^2 ----> 2.806688 = hight of triangle /// 2 x 1/2(5.7 x 2.806688) = roughly 16 /// So 24 + 17.1 + 16 = 57.1