Подобны ли треугольники abc и a1b1c1 если 1)ab 1м, AC=2м, bc=3м, a1b1=10м, a1c1=20м, b1c1=20м?
2)ab=1м,ac=3м, bc=1,5 м, a1b1=10м, ф1с1=30v. и1с1=15м
3)ab=1м,ac=2м,bc=5м, a1b1=5м, a1c1=10м, b1c1=20м?
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