Предмет: Геометрия, автор: dimon1117

Дано: треугольник ABC
угл A=90градусам
угл C=30градусам
BC=2 cm
найти АС
помогите пожалуйста

 

Ответы

Автор ответа: TatyanaTatyana
0

катет, лежащий против угла в 30 гр. равен 1/2 гипотенузы, тогда катет BA=1

по пифагору 4-1=3

катет АС=√3

Автор ответа: MechanikTM
0

SinВ=AC/BC   SinB=Sin30градусов=1/2  AC/2=1/2  AC=1

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