+0  
 
+1
30
3
avatar+241 

Thanks in advance!

 

 May 13, 2020
 #1
avatar+111360 
+2

If we draw radii to the tangent points we will have a quadrilateral  with two interior angles  = 90°  and  another interior angle =  central angle = 120°

 

And   the interior angles of a quadrilateral  sum to 360°

 

So

 

90 + 90 + 120   +  x  =  360

 

300 + x  = 360

 

x =  360 - 300  =  60°

 

 

cool cool cool

 May 13, 2020
 #2
avatar+241 
+2

Thanks CPhill

Mathisgood  May 13, 2020
 #3
avatar+111360 
+1

OK...no prob   !!!!

 

 

cool cool cool

CPhill  May 13, 2020

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