What are two ways you can find the surface area of a prism?

(2) Answers

1. If the matching ends are triangles, find the area of the triangle (A=1/2bh) 2. If Matching ends are rectangles/squares, find the area of the rectangle/square (bh) Hope that was helpful!!!


The total surface area of a prism is the sum of the area of all of its sides. The surface area = (2 * area of base) + (perimeter of base * height) If the base is a rectangle or square you can use this formula: SA = 2LW + 2(L+W)H = 2LW + 2HL + 2HW = 2(LW + LH + HW) If the base is a circle, use this formula: SA = 2πr² + 2πrh If the base is a triangle, this formula will come in handy: SA = bh + ([latex]\sf{s_1 + s_2 + s_3}[/latex])h where s₁, s₂, and s₃ are the three sides of the triangle.

Add answer