James wants to put colorful backgrounds on the back window glass and the two side window glass panes in the picture above. How much area does he need to cover? Enter your answer as a number only; no units.

912 (AND MAKE SURE YOU ADD YOUR YOUR UNITS!)

Step-by-step explanation:

So both side panels are 10 × 12, and the back glass is 12 × 18.

So we are going to do:

2 × (10 × 12) + 12 × 18

= 240 + 216

= 456

But because of the surface area formula we must multiply this by 2!

456 × 2

= 912

So your answer is 912 and whatever your unit is!

Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.