In triangle \(ABC\) are drawn trisectors (lines dividing angles into \(3\) equal parts). The trisectors closest to side \(BC\) which trisect angles \(B\) and \(C\) meet at the point \(A_1\); and in the same way we will define the points \(B_1\) and \(C_1\) (refer to the picture). Prove that triangle \(A_1B_1C_1\) is equilateral.

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TopNewestMorley's trisector theorem – Nihar Mahajan · 2 years, 5 months ago

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