SOLUTION: What is m∠A? https://media.glynlyon.com/g_geo_ccss_2013/14/img_geou13a_28.gif

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Question 876860: What is m∠A?
https://media.glynlyon.com/g_geo_ccss_2013/14/img_geou13a_28.gif
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The interior angle = 180 - the exterior angle.
The sum of the int angles = 180 degs