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प्रश्न
In the given figure, M is the mid-point of both AC and BD. Then ______.
विकल्प
∠1 = ∠2
∠1 = ∠4
∠2 = ∠4
∠1 = ∠3
उत्तर
In the given figure, M is the mid-point of both AC and BD. Then ∠1 = ∠4.
Explanation:
In ΔAMB and ΔCMD,
AM = CM ......[M is the mid-point]
BM = DM ......[M is the mid-point]
∠AMB = ∠CMD ......[Vertically opposite angles]
By SAS congruence criterion,
ΔAMB ≅ ΔCMD
∴ ∠1 = ∠4 ......[By C.P.C.T]
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