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प्रश्न
In parallelogram ABCD, find ∠B, ∠C and ∠D.
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उत्तर
Since, the sum of any two consecutive angles of a parallelogram is 180°.
∴ ∠A + ∠D = 180°
`\implies` ∠D = 180° – 80° = 100°
We know that opposite angles of a parallelogram are equal.
So, ∠B = ∠D and ∠A = ∠C
∴ ∠B = 100° and ∠C = 80°
Hence, ∠B = 100°, ∠C = 80°, ∠D = 100°
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