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Find the value of x DCEB

Find the value of x DCEB-example-1

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Answer:

Explanation:

All interior angles in a quadrilateral add up to 360.

The missing interior angle in the lower left side is 110 due to the linear pair theorem. 70+?=180 , ?=110

So,

80+56+110+3x-6=360

240+3x=360

3x=120

x=40

User ChuckE
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