Sprendimas: 1CgAyA - 1

S =
3* saknis(

3)* r^²

S = 3* saknis(

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

S = 3* r^²* saknis(

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

S = 3* r^²* 1.73205 $S$ = $3\cdot r^{2}\cdot 1.73205$

S = 5.19615* r^² $S$ = $5.19615\cdot r^{2}$