2)2a^2=sqrt8^2
2a^2=8
a^2=4a=sqrt4
a=2см
1)BD=BC=cos 75°
DC = BC sin 75° S = BC² сos 75° sin 75° BC = 11,95 см
2)2a^2=sqrt8^2
2a^2=8
a^2=4
a=sqrt4
a=2см
1)BD=BC=cos 75°
DC = BC sin 75°
S = BC² сos 75° sin 75°
BC = 11,95 см