Предмет: Геометрия, автор: SamuylinaolgaOlga

Найдите площадь ромба, один из углов которого равен 60 градусов, а сторона равна 8 см. Пояснение, решение без sin.

Ответы

Автор ответа: ЯблокиНаСнегу
0
Вот так вот так вот так (простите ,,ответ не должен быть пустой,,
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Автор ответа: ЯблокиНаСнегу
0
Без синусов
Автор ответа: Vilmar
0
проведем диагонали , получим ромб поделенный на 4 прямоугольных треугольника у этих прямоугольников один из углов будет равен 30 градусов 60/2 (диагональ поделит угол 60 гр ), а напротив угла 30 градусов в прямоугольном треугольнике лежит катет = 1/2 гипотенузы, значит половина диагонали =4 
найдем вторую диагональ из теоремы Пифагора 

d2/2=√8^2-4^2=64-16=√48=4√3

итак диагональ d1=8 d2=8√3

S=(d1*d2)/2=(8*8√3)/2=32√3

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