По св-ву угла в 30 градусов: BC=1/2 AB = 4см.
По Т. Пифагора: AC=4\/3 см.
S = 4 * 4\/3/2=8\/3см^2.
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По св-ву угла в 30 градусов: BC=1/2 AB = 4см.
По Т. Пифагора: AC=4\/3 см.
Площадь S = 4 * 4\/3/2=8\/3см^2.