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106
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Lines l and k are parallel to each other. \(m\angle A = 120^\circ\), and \(m\angle C = 80^\circ\) . What is the number of degrees in \(m\angle B\)?

 

Lightning  Sep 23, 2018
 #1
avatar+3187 
+1

These angles need to sum to 360 degrees.

 

120 + 80 + B = 360

 

B = 160 degrees

Rom  Sep 23, 2018
edited by Rom  Sep 23, 2018

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