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Fourth Brocard Triangle |
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The Fourth Brocard Triangle is the isogonal conjugate of the Second Brocard Triangle. 
 A1B1C1 - Second Brocard Triangle.A2B2C2 - Fourth Brocard Triangle.
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Fourth Brocard Triangle |
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The Fourth Brocard Triangle is the isogonal conjugate of the Second Brocard Triangle.
A1B1C1 - Second Brocard Triangle.A2B2C2 - Fourth Brocard Triangle.
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