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Math Help - Two Geometry Problems

  1. #1
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    Two Geometry Problems

    1) The ratio of three angles of a triangle area 3:4:5. Find the angles.

    2) In an isoceles triangle, the vertex angle is one-half each base angle. Find the angles of the triangle.
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  2. #2
    Super Member Matt Westwood's Avatar
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    1 Total of angles in a triangle is 180 degrees.

    Now 3 + 4 + 5 = 12, so the angles are 3/12 x 180, 4/12 x 180 and 5/12 x 180.

    You should be able to work it out from there.

    2. Translating into algebra:

    2a + b = 180
    a = 2b

    take it from there.
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