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5 August, 07:59

A triangle has sides of 8cm long and 15cm long with a 90angle between them. what is the length of the third side?

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  1. 5 August, 08:03
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    8² + 15² = c²

    64 + 225 = c²

    c² = 289

    c = 17

    The third side is 17cm long.
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