Răspunsuri

2014-09-05T06:53:00+03:00
Folosim semiperimetrul:

P = 3 * 12 = 36
p = 3 * 12 / 2 = 18

A= \sqrt{p(p-l)^{3}} = \\ = \sqrt{18(18-12)^{3}} = \\ = \sqrt{18*(6)^{3}}= \\ = \sqrt{18*216}= \\ =\sqrt{3888}= 36 \sqrt{3}cm^{2}


2014-09-05T07:36:35+03:00