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II geometry 8.26 part b

 
 
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II geometry 8.26 part b
by Jialin Wang - Tuesday, 2 November 2021, 6:43 PM
 

For this one, I know that it is supposed to be an equilateral triangle but I don't understand how you can get the radius of a circle of area 1. How do you get the final answer as 34π13?