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What's the missing angle of x

 

 Apr 28, 2020
 #1
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80 degrees

Those are supplementary angles which means that their combined total is equal to 180 degrees.

180-100 is 80

so the answer is 80 degrees

 Apr 28, 2020
 #2
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Since 100 + x is a streight angle and stright angles equal 180 degrees, x = 80 degrees since 180-100 equals x.

 Apr 28, 2020

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