ответ:
α : β = 2 : 7, α+β=180° => α=2x, β=7x
2x+7x=9x
9x=180°
x=20°
α=2*20°=40°, β=7*20°=140°
углы ромба 40°, 140°, 40° и 140°.
площадь ромба равна произведению длины его стороны на высоту, т.е s=9*5=45 (см²)
объяснение:
ромб можно нарисовать любой и провести в нём высоту
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Отрезок длиной 18 см разделили точкой на два неравных отрезка. чему равно расстояние между серединами этих отрезков?