The attic floor, ABCD in the model, is a square. The beams that support the roof are the edges of a block (rectangular prism) EF
GHKLMN. E is the middle of AT, F is the middle of BT, G is the middle of CT and H is the middle of DT. All the edges of the pyramid in the model have length 12m. Calculate the area of the attic floor ABCD.
You would have $660. The trick for 10% of something is to move the decimal one place to the left. The decimal is “hidden” to the right of the last 0. Add that interest on to get your answer!! Good luck!