+0  
 
0
25
3
avatar+2442 

I think the other 2 are 136 and 230 (My mouse is going crazy even though the sensitivity is perfectly fine, so it won't let me draw anymore)

 Feb 26, 2019
 #1
avatar+98091 
+1

These are somewhat tricky !!!

 

First one

Angle DFE   intercepts a diameter......when this is the case....its measure = 90°

So   angle  FDE =  180 - 90 - 63 =   27°

And the arc it intercepts - FE -  is twice its measure =  54°

 

Second one.....even tougher!!!

 

Angle GHJ  intercepts arc GJ   =  360 - arc IJ - arc HI - arc GH

So arc GJ =   360 - 135 - 31 - 86 = 108°

And angle GHJ intercepts this arc so it measures (1/2)(108)  = 54° 

 

 

Notice that angle GIJ intercepts the same arc....so....it also measures 54°    !!!!!

 

 

cool cool cool

 Feb 26, 2019
 #2
avatar+2442 
+1

This makes sense but the second one is kinda hard to process lol

RainbowPanda  Feb 26, 2019
 #3
avatar+98091 
+1

Agreed....all those lines make me crazy, too!!!

 

 

cool cool cool

CPhill  Feb 26, 2019

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