Jawabanmu

2014-03-14T20:41:51+07:00
Sisi = 25+25+30/2 = 80/2 = 40 L segitiga = √40(40-25)(40-25)(40-30) = √40(15)(15)(10) = √90000 = 300 K segitiga = 25+25+30 = 80 rl = 25x25x30/4x300 = 15,625 cm