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Subject: "Triangle Problem, 60-70 Variant, Solution #"

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Chris

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Oct-01-09, 07:02 AM (EST)

"Triangle Problem, 60-70 Variant, Solution #"

>>Find F on AB with BCF = 50°. This brings us into the classical framework so that we, for example, know that BDF = 30°.

This "we know that" statement is a leap too far for me. Can anyone post the steps for showing that BDF really is 30 deg.

Thanks
Chris

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