Question

Maude's living room is in the shape of a rectangle. Its dimensions are 21 feet by 14 feet. Find the length of the diagonal of the living room. Round your answer to the nearest tenth if necessary.

Answer 1

Use the pythagorean theorem A²+B²=C²

Use 21ft for A 
Use 14ft for B 
Then solve for C (the diagonal)

21²+14²=C²

441+196=C²

673=C²

√<u />673 = √C²

C≈25.24 or if you leave in radical form it is the square root of 637