Предмет: Геометрия, автор: arrestma

если периметр ромба равен 24 см, а один из углов равен 150 градусов , то площадь ромба ровна...
а) 32 см2
б) 24 см2
в) 36 см2
г) 18 см2

vadimhy9: Пусть ABCD –ромб и угол BAC=150°

S=AB*AC*sin(150°)=(AB)^2*sin(150°),

так как стороны ромба равны и Р=24,

значит AB=24/4=6

sin(150°)=sin(90°+60°)=cos(60°)=0,5

то есть

s=6*6*0,5=18

Ответы

Автор ответа: Аноним

6

Ответ:

Можешь пожалуйста мой ответ посчитать лучшим!

Объяснение:

S= 6*6*0,5= 18 см²

Г) 18 см²

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