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Need to find the Measure of angle A!!

 

 Sep 27, 2020
 #1
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what does m stand for

 Sep 27, 2020
 #2
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The three angles must sum to 180degrees, so

 

8x+5 + 6x-12 +4x+7 = 180

 

18x =180

 

x = 10

 

Now you can work out the measure of angle A.

 Sep 27, 2020

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