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I only need 4: Find the radius of circle G below.

 

 Apr 16, 2020
 #1
avatar+633 
+2

Hint: AT = AM because ED is a perpendicular bisector. Whenever a chord intersects and forms a right angle, then one of them is a perpendicular bisector.

 Apr 16, 2020
 #2
avatar+21004 
+2

You can also use the theorem that says that  MA·AT  =  EA·AD

--->   9·9  =  4·AD

--->   AD  =  81/4   

--->   AD  =  20.25

 

Find the diameter and divide by 2.

 Apr 16, 2020

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