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September 17th, 2014, 06:34 AM  #1 
Newbie Joined: Sep 2014 From: Wichita, KS Posts: 1 Thanks: 0  Calculating Circle Center Point With radius
Hello, I am trying to calculate the center point of a circle resting in a v shape. I can get the radius and the angle and position of the v. Is there a way to accomplish this? 
September 17th, 2014, 07:58 AM  #2 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,663 Thanks: 2643 Math Focus: Mainly analysis and algebra 
See the drawing below. You know the bottom angle, so you can calculate the remaining angles of the lower triangle, and hence all other angles. You know the radius of the circle, so you can calculate all lengths. 
September 17th, 2014, 12:06 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,747 Thanks: 2133 
AB = AC/sin(B/2)

September 17th, 2014, 03:53 PM  #4 
Banned Camp Joined: Feb 2013 Posts: 224 Thanks: 6 
I learned from here. How to construct (draw) tangents to a circle through an external point  Math Open Reference Proof 

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calculating, center, circle, point, radius 
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