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October 21, 2025, 08:14:51 pm
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Author Topic: circle, circle, circle  (Read 587 times)  Share 

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bar0029

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circle, circle, circle
« on: April 20, 2011, 12:36:14 am »
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Can anyone show me how to do this question...


Find the center of the circle which passes through the points -2i, 1 and 2-i.


Thank-you !! =-)
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TrueTears

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Re: circle, circle, circle
« Reply #1 on: April 20, 2011, 01:42:42 am »
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just convert to cartesian. The circle passes through these 3 points (0, -2), (1, 0), (2, -1)

is the general equation of a circle

3 coordinates, 3 unknowns (h, q, r). Solve!
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PhD @ MIT (Economics).

Interested in asset pricing, econometrics, and social choice theory.

bar0029

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Re: circle, circle, circle
« Reply #2 on: April 21, 2011, 08:50:14 pm »
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thats embarasssing..
I was typing it in as r as oppose to r squared.. quite awkward too
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