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Laurence is painting the walls and ceiling of a rectangular bedroom that is 3 m by 4.5 m. The walls are 2.5 m high.
There is a window measuring 1 m by 0.8 m on one wall and a door that is 1 m by...

That's the problem. When I see the question done it seems to make sense,but when I try it on my own I'm lost. I have no clue where to start. It's very frustrating trying to learn this chapter!

Laurence is painting the walls and ceiling of a rectangular bedroom that is 3 m by 4.5 m. The walls are 2.5 m high.
There is a window measuring 1 m by 0.8 m on one wall and a door that is 1 m by...

A packaging company is manufacturing cardboard boxes without a lid that measure 3" long, 1" wide and 1" high.
They will be cut by using a geometric net where each side of the base is simply folded...