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1. Triangle $ABC$ has circumcenter $O.$ If $AB = 10$ and $[OAB] = 30,$ find the circumradius of triangle $ABC.$

 

4. In the diagram below, O is the circumcenter of ABC. If  BAC = 28 degrees and OAC = 32 degrees, then what is the degree measure of AOC?

 Nov 11, 2019
edited by Melody  Nov 11, 2019
edited by Melody  Nov 11, 2019
 #1
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1. The circumradius is 2*sqrt(5).

 

4.  Angle AOC = 122 degrees.

 Nov 11, 2019
 #2
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both of those answers didn't work

Guest Nov 11, 2019
 #3
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Too bad, you might have to do some homework on your own.

 Nov 11, 2019

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