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 Geometry and Trigonometry
 Finding angle measures inside of a circle?		  New Topic  Reply to Topic
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Hayden4iz
New Member

USA
2 Posts
Posted - 04/03/2012 :  11:50:01  Show Profile  Reply with Quote
Here are a couple of my homework problems that I need some help with. I don't know where to even start. Would someone please be kind enough as to help?

Problem 1. http://i43.tinypic.com/1fu0xi.jpg
Solve for x and y.
I found x = 50 but i have no idea where to start with y.

Problem 2. http://i44.tinypic.com/34zbubm.jpg
Solve for z.




I guess my biggest problem is i don't know the relation between the different inscribed angles. Any help would be greatly appreciated! Thank you very much in advance
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Ultraglide
Advanced Member

Canada
278 Posts
Posted - 04/03/2012 :  12:16:48  Show Profile  Reply with Quote
I have a question about the diagrams. What do the angle measures on the circumference of the circles refer to?
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Hayden4iz
New Member

USA
2 Posts
Posted - 04/03/2012 :  12:35:04  Show Profile  Reply with Quote
They refer to the measurement of the arc, if I understand correctly.
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royhaas
Moderator

USA
3039 Posts
Posted - 04/03/2012 :  14:47:00  Show Profile  Reply with Quote
Use what you know about vertical (opposite) angles.
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Ultraglide
Advanced Member

Canada
278 Posts
Posted - 04/03/2012 :  18:15:54  Show Profile  Reply with Quote
What do x and y add up to? I have never seen arcs measured in degrees.
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