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28 October, 02:41

If triangle ABC with vertices A (-2, - 5), B (-3, 2), and C (1, - 2) a right triangle?

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  1. 28 October, 02:49
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    Hello:

    A (-2, - 5), B (-3, 2), and C (1, - 2)

    calculate : AB², AC², BC²

    AB² = (-3 + 2) ² + (2 + 5) ² = 50

    AC² = (1 + 2) ² + (-2 + 5) ² = 18

    BC² = (1 + 3) ² + (-2 - 2) ² = 32

    by petagor rule : AB² = AC² + BC² ... (ABC is a right triangle in : C)
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