The radius of circle ABC, centre B is r1.

The radius of circle CDE, centre D is r2.

For the diagram above PROVE that AC/CE = r1/r2

:l

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- Nov 9th 2012, 05:45 PMcrossfireProve question
The radius of circle ABC, centre B is r1.

The radius of circle CDE, centre D is r2.

For the diagram above PROVE that AC/CE = r1/r2

:l - Nov 9th 2012, 05:45 PMcrossfireRe: Prove question
This is a picture

- Nov 9th 2012, 06:23 PMrichard1234Re: Prove question
Hint: There are some similar triangles in the diagram...

- Nov 9th 2012, 06:32 PMjakncokeRe: Prove question
How about this pic attached. $\displaystyle \frac{\sqrt(2)*r1}{\sqrt(2)*r2} = \frac{r1}{r2} $

- Nov 9th 2012, 06:43 PMcrossfireRe: Prove question
Jakncoke, I dont quite understand where and how you got those figures could you please explain?

- Nov 9th 2012, 07:11 PMrichard1234Re: Prove question
@jakncoke, that's only a specific case (for right isosceles triangles). It does generalize, using similarity.

- Nov 9th 2012, 08:57 PMjakncokeRe: Prove question
yea my bad, i wasn't thinking.