express d in terms of side a, b and c. (Two circles is similar)http://im24.gulfup.com/2012-04-18/1334758595741.jpg

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- Apr 18th 2012, 07:18 AMMhmh96expressing d in terms of side a, b and c.express d in terms of side a, b and c. (Two circles is similar)http://im24.gulfup.com/2012-04-18/1334758595741.jpg

- Apr 18th 2012, 07:42 AMWilmerRe: expressing d in terms of side a, b and c.
HINT:

Treat each triangle separately; you have a common side length d.

Assign r = 1 (circles' radius)

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Derivation of Formula for Radius of Incircle - Apr 18th 2012, 08:16 AMMhmh96Re: expressing d in terms of side a, b and c.
But how to use this formula without knowing the length of any sides in two triangles ?