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Geometry 

 Jan 31, 2018
 #1
avatar+100483 
+2

We have an irregular  pentagon

 

The sum of the interior angles   = 

 

(Number of Sides - 2) * 180  =

 

(5 - 2) * 180  =

 

3 *  180  =

 

540°

 

So....this implies that

 

(2x + 10 )    + 148  +  90   + 112  +  2x   =  540        simplify

 

4x  +  360  =  540      subtract  360  from both sides

 

4x  =  180      divide both sides by  4

 

x  =  45

 

 

cool cool cool

 Jan 31, 2018

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