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prove that the consecutive angles of a parallelogram are supplementary

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Kimkim13viz
Property no. 3 of the parallelogram :) (Consecutive angles of a parallelogram are supplementary)
Dominiviz
If you happen to read the Properties of a Parallegram. There you'll find that;

In a parallelogram, any two consecutive angles are ALWAYS supplementary.

Remember:
That the 'Properties of a Parallelogram' is NOT A THEOREM, but has been PROOVED by mathematicians.

Hope it Helps =)
----Domini----