<PRE><B>Question 1027133</B>
 you have hired a contractor to build a house. the rectangular foundation (the cornet slab that the house is built on) has just been finished. you want to make sure that the construction is done well and the foundation is square, so you decide to see if the corners are right angles. you measure the width of the foundation to be 40 feet. the length to be 75 feet and the diagonal to be 85 feet. did the company build the foundation with right angles? prove your answer 
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Check the Pythagorean relation::
85^2 = 40^2 + 75^2
7225 = 7225
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Company did good
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Cheers,
Stan H.
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