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5 September, 08:36

Brandon has an extension ladder that can only be used at a length of 10 feet, 15 feet, or 20 feet. He places the base of the latter 9 feet from the wall I need the top of the ladder to reach 12. Which ladder laying with Benton need to use to reach the height of the wall?

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  1. 5 September, 11:46
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    15

    Step-by-step explanation:

    Use Pythagorean theorem.

    c² = a² + b²

    c² = 9² + 12²

    c² = 225

    c = 15
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