ответ: 64 см
Объяснение: Примем больший угол равным х. Тогда меньший равен х-60°. Сумма углов при одной стороне параллелограмма 180°. Ромб - параллелограмм. Поэтому х+х-60°=180°=>
2х=240°, х=120°. Меньший угол 120°-60°=60°. Диагонали ромба являются биссектрисами его углов. Поэтому меньшая диагональ ромба делит его на два треугольника с углами, равными 60°. => Эти треугольники равносторонние. Следовательно, стороны ромба равны меньшей диагонали. Стороны ромба равны.
Р(ромба)=4•16=64 см.
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В треугольнике АВС угол А в 2 раза больше угла В, а угол С в 3 раза больше угла А. Вычислите величины углов треугольника АВС. В ответе расположите числа в порядке возрастания.
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