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July 18th, 2017, 01:10 AM   #1
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NO idea how to do this Circle problem

Could I get some help with this question?

The question just asks for the length of RS, which I don't know how to calculate.

Help with solving the question would be greatly appreciated!

Last edited by skipjack; July 18th, 2017 at 03:41 AM.
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July 18th, 2017, 03:43 AM   #2
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Do you get to use analytic geometry? I.e. equation of a circle? Or do you have to use purely synthetic means?
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July 18th, 2017, 03:48 AM   #3
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By symmetry, P has coordinates (6, 0). By Pythagoras, the radius of each circle is 5.
Hence R has coordinates (1, 0) and S has coordinates (5, 0), and so RS = 4.

Last edited by skipjack; July 18th, 2017 at 03:50 AM.
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July 18th, 2017, 03:59 AM   #4
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Quote:
Originally Posted by Micrm@ss View Post
Do you get to use analytic geometry? I.e. equation of a circle? Or do you have to use purely synthetic means?
I guess this was a stupid question when the original problem phrased things in terms of coordinates.
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