Jawabanmu

2014-09-09T00:32:25+07:00
2014-09-09T02:06:05+07:00
Rl = AB . BC . AC / 4 . luas sgtga
= 21 . 35 . 28 / 4 . 0.5 . 21 . 28
= 17.5 cm

Cara cepat Rl u/ sgtiga siku2

sisi miring / 2 = 35 /2 = 17.5 cm