Question

find the surface area of the triangular prism.
now, find the area of the rectangles.
(formula: a = lw)
area of both triangles: 36 cm²
area of the bottom rectangle: 36 cm²
area of the back rectangle: ? cm²

Explanation:

Step1: Identify the length and width of the back rectangle

The back rectangle has a length \( l = 6\) cm and a width \( w=9\) cm.

Step2: Use the formula for the area of a rectangle

The formula for the area of a rectangle is \(A = lw\). Substitute \(l = 6\) and \(w = 9\) into the formula: \(A=6\times9\).

Step3: Calculate the area

\(6\times9 = 54\)

Answer:

\(54\)