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what

 Mar 17, 2021
 #1
avatar+141 
+1

angle a and angle b are on the same line, so they must add up to 180 degrees.

 

since we already know the value of angle a, all we have to do to solve for angle b is 

180 - 109 = 71.

 

so angle b is 71 degrees, which is the second option. 

 

hope this helped! please let me know if you are confused about anything i did smiley

 Mar 17, 2021

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