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Math Help - expressing d in terms of side a, b and c.

  1. #1
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    expressing d in terms of side a, b and c.

    express d in terms of side a, b and c. (Two circles is similar)

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  2. #2
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    Re: 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)
    Go here:
    Derivation of Formula for Radius of Incircle
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  3. #3
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    Re: 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 ?
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