Author Topic: Points of intersection of two circles? (Read 805 times) Tweet Share

BubbleWrapMan · « **on:** November 27, 2010, 02:28:32 pm »

What's the easiest way to do this, if given the equations of the two circles?

For example

(x-5)^2 + (y-7)^2 = 25
(x-15/2)^2 + (y-19/2)^2 = 25/2

taiga · « **Reply #1 on:** November 27, 2010, 03:11:26 pm »

Expand it all out and bring everything to the same side. Then make the two equations equal eachother

BubbleWrapMan · « **Reply #2 on:** November 27, 2010, 03:17:21 pm »

That's really the easiest way? If I do y = y then it takes a whole page of working.

taiga · « **Reply #3 on:** November 27, 2010, 03:39:42 pm »

Calculator, otherwise there isnt any way as far as I see it

BubbleWrapMan · « **Reply #4 on:** November 27, 2010, 03:46:57 pm »

I guess they wouldn't expect you to do it by hand then?

taiga · « **Reply #5 on:** November 27, 2010, 03:49:07 pm »

I guess they wouldn't expect you to do it by hand then?

Highly unlikely

BubbleWrapMan · « **Reply #6 on:** November 27, 2010, 03:55:50 pm »

Brilliant.

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