Question

�ABCD is a parallelogram. The ratio of ÐA and ÐB of this parallelogram is 5 : 4.

Find the measure of Ð B.

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Answer 1

Step-by-step explanation:

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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Answer 2

Answer:

I think you will be satisfy with this . I hope it will help you dear friend.