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amedel1

  • 4 years ago

A rectangular deck measures 15 ft. by 20 ft. What is the length of a diagonal between opposite corners?

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  1. CoCoTsoi
    • 4 years ago
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    sqrt(15^2 + 20^2) = 25

  2. benice
    • 4 years ago
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    use Pythagoras theorem which states |dw:1333044166463:dw| a^2+b^2=c^2

  3. amedel1
    • 4 years ago
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    wow thanks!!

  4. Directrix
    • 4 years ago
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    Think Pythagorean Triples. (15, 20, ?) is a 5 multiple of the triple (3, 4, 5). 3*5 = 15 and 4*5 = 20. So 5*5 = 25 is the missing length (hypotenuse)

  5. amedel1
    • 4 years ago
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    ohhh okay thank you! Very helpful!

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