SOLUTION: What is the longest length of an umbrella that will lay flat in the bottom of a backpack that is 12 inches by 17 inches.

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Question 284595: What is the longest length of an umbrella that will lay flat in the bottom of a backpack that is 12 inches by 17 inches.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The diagonal = sqrt%2812%5E2+%2B+17%5E2%29
= sqrt%28433%29
=~ 20.8 inches