SOLUTION: Hello this is a word problem but i do not know what steps to take to solve it, please help. James is building a new desk, to make sure he had made a square corner he measures

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Question 143638: Hello this is a word problem but i do not know what steps to take to solve it, please help.

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.
diagonal=_______ft? round to the nearest thousandth

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
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.
:
This is Pythagorean Theorem problem: a^2 + b^2 = c^2
:
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%2889%29
c = 9.434 ft is the diagonal
:
:
Check this on a calc: enter sqrt%288%5E2+%2B+5%5E2%29 = 9.433981..