Hello, Sherpa!

Your formula is correct.

. . Your answers should have been correct.

Code:* / * * * | * * | * * a | c * * | * * | * / h * - - - - - - - - - - - * b

The triangular faces are all right triangles.

. . The area of a triangle is: .

. . Hence, the area oftriangles is: .two

There are three rectangluar panels.

. . Their areas are: .

Therefore, the total surace area is: .