How to square a room?

Question

I am going to make a small shed and I need to know how to square it. I know that if you measure down one side a certain distance and down the other side a certain distance that your hypotumus will equal a certain distance. It is something like this ,,, 2ft 4 ft = 6 feet is that correct for the hypotumus. Are there other measurement for larger rooms that follow the same pattern.

Thanks ,,, sorry for being so wordy

Answer 1

The numbers you were thinking of are 3, 4, and 5.
Just measure 3 ft out from a corner of the room, make a mark.
Measure 4 ft out from the same corner on an adjacent wall, make a mark. Connect the marks with a measuring tape. If the tape reads 5ft (at the "hypotenuse"), you have a right angle. Adjust the wall until the hypotenuse reads 5 feet.

Answer 2

To obtain square foot, measure the length, then the width. Multiply the length times the width and there's your square footage. For instance, if it's 12 x 10, the sq.ft. is 120.
9 x 12 is 108, etc., etc.

Edit: I'm sorry, I didn't really read your question thoroughly. The first answer is correct.

Answer 3

Us carpenters get a headache when confronted with large math problems.

Measure the corner to corner distances diagnolly..if they are the same you have a perfect square.