Question

find the surface area of the prism using the net. what is the area of the side rectangles? front and back triangles: 64 cm² side rectangles: ? cm² bottom rectangle: cm² surface area: cm²

Explanation:

Step1: Identify side - rectangle dimensions

There are two side - rectangles with dimensions 8 cm (width) and 9 cm (height).

Step2: Calculate area of one side - rectangle

The area of a rectangle is $A = lw$. For a rectangle with $l = 9$ cm and $w = 8$ cm, $A_1=9\times8 = 72$ $cm^2$.

Step3: Calculate total area of side - rectangles

Since there are 2 such rectangles, the total area of side - rectangles $A_{total}=2\times72=144$ $cm^2$.

Answer:

144