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Question

In the following figure, ABCD is a parallelogram. Find the value of x

182370_5e078b1f75654693aef9f28d900c752f.png

A
8
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B
12
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C
13
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D
14
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Solution

The correct option is B 12
GiventhatABCDisaparallelogram.Weknowthatinaparallelogramoppositeanglesareequal.Sofromthegivenfigure,B=D6x+3y8=7y6x4y=8x=8+4y6(1)Alsoweknowthatadjacentanglesinaparallelogramaresupplementary.SoA+D=180o4x+20+6x+3y8=180o10x+3y=168(2)Using1in2,10(8+4y6)+3y=16880+40y+18y=168×658y=10088058y=928y=92858y=16oUsingy=16in1,x=8+4×166x=8+646x=726x=12oSox=12o&y=16o

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