1.

ΔABC में ∠B = 72°, ∠C = 64°, ∠A का ज्ञात कीजिए।

Answer»

ΔABC में ∠B = 72°, ∠C = 64°, ∠A = ?

∠A + ∠B + ∠C = 180°

∠A + 72° + 64° = 180°

∠A + 136° = 180°

∠A = 180° – 136°

∠A = 44°



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