trig

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can you please tell me if the points (8,9) (15,2) and (17,4) are the vertices of a right triangle

  • trig -

    The lengths L of three sides are sqrt 98, sqrt 8 and sqrt 106. You can prove that using
    L = sqrt[(y2-y1)^2 + (x2-x1)^2]
    The pythagorean relationship a^2 + b^2 + c^2 is therefore obeyed, since 98 + 9 = 106.
    What does that tell you about the triangle?

    You could prove it in other ways, but this appeared to be the simplest.

  • trig -

    so tey are vertices of a triangle?

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