1 Answer

Krynio · Answer 1 · 2022-10-02T08:50:07+0000

Answer:

Total surface area = 132 square feet

Explanation:

Surface area of the triangular prism = Area of the triangular bases + Area of the lateral rectangular sides

Area of the triangular surface =
$(1)/(2)(\text{Base})(\text{Height})$

=
(1)/(2)* 5* 4

= 10 square feet

Area of the rectangular side with dimensions 5ft by 7ft,

Area = 5 × 7 = 35 square feet

Area of the rectangular side with dimensions 7ft by 4ft,

Area = 7 × 4 = 28 square feet

Area of the rectangular side with dimensions 7ft by 7ft,

Area = 7 × 7 = 49 square feet

Total surface area = 2(10) + 35 + 28 + 49

= 132 square feet

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