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.

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

√673 = √C²

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

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