Предмет: Геометрия, автор: lmzdjk654

Нужно полное решение

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Ответы

Автор ответа: anastasiapff
1

Ответ:

А4-2

если соs a=1/2

cos^2 a+sin^2 a=1

(1/2)^2+sin ^2 a=1

sin ^2 a=1-1/4=3/4

sin a= √3/2

tg a=sin a/cos a=√3/2:1/2=√3

A5-2

высота проведенная из прямого угла прямоугольного треугольника является средним пропорциональным для отрезков на которую она делит гипотенузу

h=√(25*7)=5√7

A6-3

отношение площадей равно k^2

отношение периметров равно k, т.е. √16/9=4/3


lmzdjk654: Есть ещё три таких задачи от меня, .поможешь решить?
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