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The angle bisectors (Posted on 2020-10-10) Difficulty: 3 of 5
In triangle ABC, the angle at vertex B is 120 degree. Let A1, B1, C1 be points on the sides BC, CA, AB respectively such that AA1, BB1, CC1 are bisectors of the angles of triangle ABC. Determine the angle A1B1C1.

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  Subject Author Date
Solutioncomputer solutionCharlie2020-10-10 15:29:57
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