Question 143638
James is building a new desk, to make sure he had made a square corner he measures 8 ft from the corner along one edge and 5 ft from the corner along the other edge. How long should the diagonal be between those two points if the corner is a right angle.
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This is Pythagorean Theorem problem: a^2 + b^2 = c^2
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In this problem a=8; b=5; find c which is the diagonal
:
c^2 = 8^2 + 5^2
c^2 = 64 + 25
c^2 = 89
c = {{{sqrt(89)}}}
c = 9.434 ft is the diagonal
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Check this on a calc: enter {{{sqrt(8^2 + 5^2)}}} = 9.433981..