SOLUTION: Ellen painted on a canvas with sides 80cm by 55cm. She needs to brace the canvas, how long does the brace need to be?

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Question 984148: Ellen painted on a canvas with sides 80cm by 55cm. She needs to brace the canvas, how long does the brace need to be?
Answer by Alan3354(69443) About Me  (Show Source):
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Ellen painted on a canvas with sides 80cm by 55cm. She needs to brace the canvas, how long does the brace need to be?
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If the brace is the diagonal, use Pythagoras to find the hypotenuse.