A rectangular closet has a perimeter of about 20 feet and a width of about 3 feet. Find the diagonal.

Answer 1

The perimeter P(=20 approx.) of a rectangle is twice the sum of width W(=3 approx.) and length L, or
P=2(W+L)
If W=3, then
20=2(3+L)
Solve for L to get L=7 (approximate, because W=3 is approximate)
The diagonal D can be found using Pythagoras theorem, namely
D=√(L²+W²)
Note that the answer is approximate because of the uncertainty of P and W.
Post your answer for a check if you wish.

Answer 2

4523413

Answer 3

confused