.........................................e...................................................
Answer:
what?
Step-by-step explanation:
A
2910 ….....................….......
178.3 mm²
Surface area = Base area + 3 x side triangles area
Sₐ = 43.3 + 3 x (1/2 x (10 x 9)) = 43.3 + (3 x 45) = 178.3