What Can we Assume About a Circle, Given a Diagram?

[brittany.alex.robinson]

Hello - I am specifically looking at Guide 6: Quantitative Comparisons & Data Interpretation, Chapter 5/P.98, problem 6.

In it we are given a circle with a point O that appears to be a in the center of the circle and what appear to be two radii going to the edge of the circle. I got this problem wrong because I did not think we could assume that the two segments were radii nor could we assume that O was the center point of the circle (so I chose "D").

If a point appears to be in the center of a circle, can we assume that it is indeed the center of the circle, even if not explicitly told? If not, I am not sure how this problem could be anything other than D.

Appreciate any insights!!

-Alex

[prashantnigam16]

It would be great to look at the exact actual problem. Can you post a snapshot of the problem from the book?

[tommywallach]

Hey Brittany,

I agree with you. This looks like an error. Apologies! Either way, hopefully you can still enjoy the math at the heart of it.

-t