The surface area of the triangular prism is 153 cm².
What is a triangular prism?
Suppose you've got a triangle. Now, stretch it up so as to make a stack of triangles up above another. This new 3d object is called a triangular prism.
Usually, when we talk about a triangular prism, we talk about the triangular prism, whose stack goes straight up, thus, we talk about a right triangular prism.
The area of the triangular prism is the sum of the area of the rectangle and the area of the triangle, therefore, the area of the prism will be,
Area = A + B + C
=(9 × 15) + (0.5×6×3) + (0.5×6×3)
= 135 + 9 + 9
= 153 cm²
Hence, the surface area of the triangular prism is 153 cm².
Learn more about the Lateral surface area of triangular prisms:
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