Question

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Answer 1

The surface area of the triangular prism is of 140 cm².

What is the surface area of a prism?

It is the sum of the areas of all faces of a prism. In this problem, the prism has these following faces:

• One rectangle of dimensions 8 cm and 6 + 4 + 5 = 15 cm.

• Two right triangles with sides 4 cm and 5 cm.

For a rectangle, the area is given by the multiplication of the dimensions, hence:

Ar = 8 x 15 = 120 cm²

For each right triangle, the area is given by half the multiplication of the sides, hence:

At = 2 x 0.5 x 4 x 5 = 20 cm².

Then the surface area of the prism is:

S = 120 cm² + 20 cm² = 140 cm².

More can be learned about surface area at brainly.com/question/28123954

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