Расчет: AYaVH8 - 1

S =
2* saknis(

3)* r^²

S = 2* saknis(

3)* r^² $S$ = $2\cdot \sqrt {3}\cdot r^{2}$

S = 2* r^²* saknis(

3) $S$ = $2\cdot r^{2}\cdot \sqrt {3}$

S = 2* r^²* 1.73205 $S$ = $2\cdot r^{2}\cdot 1.73205$

S = 3.4641* r^² $S$ = $3.4641\cdot r^{2}$