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what is x? thanks :)

Guest Nov 17, 2017
 #1
avatar+88871 
+2

We have a decagon ....the sum of the interior angles in a decagon is  (10 - 2)*180  =

1440°

 

[ Hint : The 80°  exterior angle means a 360 - 80  = 280°  interior angle  ]

 

So we have that

 

[ 107 + 126 + 325 + 125 + 95 +  x + 90 +  280 + 47 + 130 ]  = 1440

 

Rearrange as

 

1440 - [ 107 + 126 + 325 + 125 + 95 +  90 +  280 + 47 + 130 ]  = x

 

1440 - [ 1325 ]  =  x

 

115°  =  x

 

 

cool cool cool

CPhill  Nov 17, 2017
 #2
avatar
+1

thanks sosososososoosososoososo much cool

Guest Nov 17, 2017

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