• anonymous
Which undefined term is needed to define a circle? A. Point B. Radius C. Line D. Ray
HippoCampus Algebra & Geometry
  • chestercat
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  • anonymous
Hi everyone. I just started in my Geometry course and I'm just having a little difficulty with this question. It's just a simple worksheet, I understand everything else. It's just this one question is weird because I haven't worked with circles in a while and this fact is not anywhere in the lesson from what I can see. I'm starting to understand the concept of defined and undefined terms. However, I am not sure if "radius" is an undefined or defined term. I was going to choose "radius." Does anyone have any ideas? I mean, I know this is probably really simple stuff, but like I said, I just started.
  • anonymous
OK so three points define a circle, so the answer would be A point. this is how: |dw:1334355538396:dw| So as you can see there are three points on the outside and and only one circle has all three points on it. They are always the same distance away from the center point. In fact any of these lines from the center point out are called radius. If you would like a slightly silly website for that go to: It is slightly corny cause it's called circles are awesome, but anyways click on learn about circles and it explains it all really well .Good luck with that worksheet!

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