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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- June 21st 2006, 03:39 PMJudiProof
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.

- June 21st 2006, 06:36 PMdancingshoes63
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.