+0  
 
+1
42
2
avatar+241 

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 May 13, 2020
 #1
avatar+111360 
+1

We can use  this fact about  the angles gormed by intersecting chords

 

x = (1/2) (78 + 76)  = (1/2) ( 154)  =  77°

 

 

cool cool cool

 May 13, 2020
 #2
avatar+241 
+2

thanks cphill

Mathisgood  May 13, 2020

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