Пошаговое объяснение:
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ответ: 2.5√14 ед. кв.
Пошаговое объяснение:
Найдем площадь треугольника А₁А₂А₃ по формуле - половина произведения длин сторон на синус угла между ними с векторов →А₁А₂ и →А₁А₃.
/см. решение в приложении/
. с векторного произведения. Решать не буду. напишу алгоритм, как альтернатива моему решению. можете проверить при желании. ответы совпадают.
находите координаты векторов А₁А₂ и А₁А₃, затем векторное произведение этих векторов, затем модуль этого произведения и наконец умножаете этот модуль на 0.5, получаете 2.5√14
Поделитесь своими знаниями, ответьте на вопрос:
Спортивном лагере 60 девочек, что в 4 раза меньше, чем мальчиков. всех детей россили в три корпуса, поровну в каждый корпус. сколько детей живет в каждом корпусе?