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Thread: Deductive geometry

  1. July 24th 2011, 09:25 PM #1
    ilovemaths321
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    Deductive geometry

    Hello. So I was given this diagram:
    Deductive geometry-geom.jpg
    Now I have to prove (using deductive geometry) why CX.XD is always equal to AX.XB. Hope someone out there can help!
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  2. July 24th 2011, 09:51 PM #2
    pickslides
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    Re: Deductive geometry

    It comes back to similar triangles.

    Read this: Intersecting Chords Theorem
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  3. July 24th 2011, 10:48 PM #3
    ilovemaths321
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    Re: Deductive geometry

    Ohh, I get it now. Thanks.
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