If the room is 15-by-15 feet, how many square feet is that?

A square based pyramid will have one square face on the bottom and four diagonal faces (one for each side).

Turn your brightness way down so the glow of the screen will be harder to detect.

You can start by decluttering your room! Take the toys out or anything that looks too childish. If your parents won’t let you sell or donate them, pack them away...

No, no, no. Moving an exterior wall is a whole and completely different game. Please hire someone qualified, licensed, inspected and fully insured.

First of all, the room is not square. It's never square. Start by making a cross in the enter of the room, then measure out from the center in each...