Răspuns :
Raza cercului inscris intr-un poligon regulat este egala cu apotema.
[tex]r=\frac{1}{3}h=\frac{1}{3}\frac{l\sqrt3}{2}=\frac{1}{3}\frac{2\sqrt6\sqrt3}{2}=\frac{\sqrt6\sqrt3}{3}=\frac{3\sqrt2}{3}=\sqrt2[/tex]
[tex]r=\frac{1}{3}h=\frac{1}{3}\frac{l\sqrt3}{2}=\frac{1}{3}\frac{2\sqrt6\sqrt3}{2}=\frac{\sqrt6\sqrt3}{3}=\frac{3\sqrt2}{3}=\sqrt2[/tex]
raza cerc inscris = aria / semiperimetrul
aria = l²√3 /4 = ( 2√6) ² √ 3 / 4 = 6√3
semiperim. = 3 · 2√6 /2 = 3√6
raza = 6√3 / 3√6 = 2 / √2 = √2
aria = l²√3 /4 = ( 2√6) ² √ 3 / 4 = 6√3
semiperim. = 3 · 2√6 /2 = 3√6
raza = 6√3 / 3√6 = 2 / √2 = √2