Odpowiedź :
(rysunek w załączniku) :-)
[tex]2x = 12\\x = 6\\x = 2r\\r = 3[cm]\\H = 6\sqrt{3} \\\\P_c =2P_p + P_b\\\\P_p=\pi r^{2} \\\\P_b = 2\pi r*H\\\\P_c = 2\pi *9+2\pi *3*6\sqrt{3} \\P_c = 18\pi (1+2\sqrt{3})[cm^2][/tex]
(rysunek w załączniku) :-)
[tex]2x = 12\\x = 6\\x = 2r\\r = 3[cm]\\H = 6\sqrt{3} \\\\P_c =2P_p + P_b\\\\P_p=\pi r^{2} \\\\P_b = 2\pi r*H\\\\P_c = 2\pi *9+2\pi *3*6\sqrt{3} \\P_c = 18\pi (1+2\sqrt{3})[cm^2][/tex]