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дано:АВСД ромб
периметр ромба=100см
АС:ВД=3:4
найти площадь ромба
Ответы 1
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Из периметра ромба найти сторону: 100:4=25 смДиагонали делят ромб на 4 равных прямоугольных треугольника. Катеты одного из них относятся 1,5:2. По теореме Пифагора (2,25+4) кв части=625 кв см, 1 кв часть=100 в см, 1 часть = 10 см. Тогда диагонали равны 30 см и 40 смПлощадь равна половине произведения диагоналей. S = 600 кв см
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Автор:
leach - 6 лет назад
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London
London is the capital of the United Kingdom of Great Britain and Northern Ireland. It is situated on the Thames. It is a large industrial and cultural center. It is one of the largest cities in the world. It's population is more than 8 million people.
The Thames divides London into parts: the West End and the East End.
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