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Geometry 

party.girl286  Jan 31, 2018
 #1
avatar+87639 
+2

Again...we have an irregular pentagon

 

Just like the other problem, the interior angles sum  to  540°

 

The "missing" angle in the pentagon  will be supplemental to A  and will =  180 - A

 

So.....we have that

 

115 + 96  +  118  + 104  +  ( 180 - A)  =  540       simplify 

 

613   -  A   =  540         add A to both sides, subtract 540 from both sides

 

73°  =  A

 

 

cool cool cool

CPhill  Jan 31, 2018

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