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**tony123****Member**- Registered: 2007-08-03
- Posts: 222

The opposite sides of a convex hexagon

are parallel, the distances separating the parallel pairs of sides are equal,

and the angles at vertices A and D are right angles. Prove that the diagonals BE

and CF enclose an angle of

*Last edited by tony123 (2023-03-17 06:28:49)*

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