Jawabanmu

2014-04-05T18:27:25+07:00
2014-04-05T18:28:05+07:00
Akar s(s-a)(s-b)(s-c) / s                       s= 1/2 keliling= 18
= akar18(8)(8)(2) / 18
=akar 2304 / 18
= 48 / 18
= 2, 6666
maaf kalo salah