 | | Math problem, please help!
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| I have a circle with unknown radius. Origo is at x=-310, y=unknown. One known point is x=-310, y=-50, that's the top value of y. The other known point is at x=-30.37, y=-120.11 I want to know the radius of the circle. It could be somewhere between (...) (22 years ago, 4-Nov-02, to lugnet.cad)
| | | | | Re: Math problem, please help!
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| (...) Easy using pythagoras: r^2 = (r-70.11)^2 + (279.63)^2 a little manipulation yields r = 592.70 sound about right? ROSCO (22 years ago, 4-Nov-02, to lugnet.cad)
| | | | | Re: Math problem, please help!
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| Math can be broken down as follows. origin is x0, y0. radius is r. we know x0=-310. y0, r are unknowns. general equation for a circle: (x-x0)^2 + (y-y0)^2 = r^2 from point one, we know (-50-y0)^2 = r^2. from point two, we know (-30.37- -310)^2 + (...) (22 years ago, 4-Nov-02, to lugnet.cad)
| | | | | Re: Math problem, please help!
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| (...) Sounds about exactly correct. Sometimes when I stare long enough into a problem, I just keep trying the same wrong way. :o/ Thanks Rosco! I should be able to calculate the next radius myself. /Tore (22 years ago, 4-Nov-02, to lugnet.cad)
| | | | | Re: Math problem, please help!
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| Great! Thanks a lot. I was thinking of some derivata equation. Totally offside. :o) /Tore (...) (22 years ago, 4-Nov-02, to lugnet.cad)
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