prove that: A diagonal of a parllelogram divedes it into two congruent triangle.
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Statement : A diagonal of a parallelogram divides it into two congruent triangles.
Given : A parallelogram ABCD.
To prove : ΔBAC ≅ ΔDCA
Construction : Draw a diagonal AC.
Proof :
In ΔBAC and ΔDCA,
∠1 = ∠2 [alternate interior angles]
∠3 = ∠4 [alternate interior angles]
AC = AC [common]
ΔBAC ≅ ΔDCA [ASA]
Hence, it is proved.
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Solution ⬆️⬆️⬆️⬆️
Similarly another pair can also be shown congruent by drawing anther diagonal and using same criteria of congruence
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