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Mathematics, 22.11.2020 14:10 diablo871

21. Triunghiul ABC este echilateral, iar bisectoarele unghiurilor exterioare B si C se intersectează în punctul D. Demonstrați că ABCD este echilateral. Urgent

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21. Triunghiul ABC este echilateral, iar bisectoarele unghiurilor exterioare B si C se intersectează...

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