Question

22 points! Which expressions will help you find the surface area of this right triangular prism? Select all that apply.

11 × 3
× 3 × 5
4 × 11
5 × 11

Answer 1

11 • 3
4 • 11
5 • 11

Area of right triangle = 1/2 (b • h)
in this case = 1/2 (3 • 4) = 6cm^2

Area of rectangles = b•h

Rec 1 = 11•4
Rec 2 = 11•3
Rec 3 = 11•5

Answer 2

The expressions

4 x 11

and

5 x 11

will help because they will work out the area of the top and bottom of the triangular prism which will help in finding the surface area of the whole shape.