Question

2. ABCD is a parallelogram. The ratio of A and B of this parallelogram is
5: 4. Find the measure of B.​

Answer 1

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Answer ⤵️

Let the common multiple of the given ratio then

∴∠A=5x

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and∠B=4x

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□ ABCD is a parallelogram.

∴∠A+∠B=180

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[Adjacent angle of parallelogram are supplementary]

∴5x+4x=180

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⇒9x=180

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⇒x=180/9

⇒x=20

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∠B=4x=4×20

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=80

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The measure of ∠B is 80

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Step-by-step explanation:

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