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how to proof that diagonals of trapezium are equal ?

Mark M. answered • 09/15/15

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The two non-parallel sides of the trapezoid must be congruent.

The diagonals shall create two overlapping triangles that share the base as a common side.

The base angles of a trapezoid are equal.

The two triangles are congruent by SAS

The two diagonals are congruent by Corresponding Parts.

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