Opposite sides of a parallelogram
Asked by maham237 @ in Mathematics viewed by 280 People
Prove that opposite sides of a parallelogram are congruent. Be sure to create and name the appropriate geometric figures.
Asked by maham237 @ in Mathematics viewed by 280 People
Prove that opposite sides of a parallelogram are congruent. Be sure to create and name the appropriate geometric figures.
Answered by maham237 @
Theorem : Opposite sides of a parallelogram are congruent or equal.
Let us suppose a parallelogram ABCD.
Given: and (According to the definition of parallelogram)
We have to prove that: AB is congruent to CD and BC is congruent to AD.
Prove: let us take two triangles, and
In these two triangles, { By the definition of alternative interior angles}
Similarly,
And, AC=AC (common segment)
By ASA,
thus By the property of congruent triangle, we can say that corresponding sides of are also congruent.
Thus, AB is congruent to CD and BC is congruent to AD.
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