В правильной треугольной пирамиде сторона основания равна m. Угол между смежными боковыми гранями равен 120°. Найдите площадь боковой

They want her to be grateful.
Children expect their parents to be cool with their problem.
His teacher made him prepare a report.
A teacher would like children to behave well.
Tom doesn't let his parents treat him like a child.