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Math Help - Which are the vertices of an isosceles triangle? Algebra 1.

  1. #1
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    Exclamation Which are the vertices of an isosceles triangle? Algebra 1.

    Hello! Could you please state the correct answer to this multiple choice problem, as well as explain it? Thanks!

    Which are the vertices of an isosceles triangle?
    A. G(5, 1), H(-4, 3), I(2, 6)
    B. D(2, -6), E(1, -5), F(8, 0)
    C. J(0, 4), K(-3, -4), L(1, -5)
    D. A(6, 3), B(-2, 4), C(2, 11)
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  2. #2
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    Hi

    The question is : what is an isosceles triangle ?
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  3. #3
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    a triangle with two equal sides/angles.
    correct?
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  4. #4
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    Yes

    You just need to calculate the sides of each triangle
    For instance the coordinates of \vec{GH} are (-9,2) therefore GH = \sqrt{\vec{GH}^2} = \sqrt{(-9)^2+2^2} = \sqrt{85}
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