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Thread: Proof

  1. #1
    Junior Member
    Jun 2006

    Post Proof

    Prove that the opposite sides of a rectangle are equal in neutral geometry assuming a rectangle is defined as a (convex) quadrilateral having four right angles.
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  2. #2
    Jun 2006
    If a rectangle exists, then all triangles must have a defect of 0. Since the angles are 90, you can probably start proving triangles congruent.
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