Jawabanmu

2014-06-07T14:25:23+07:00
L = d1xd2 x 1/2
300 = 24 x A x1/2
600 =24a
a=25
jadiii OD = 25-20 =5
pakai pitagoras 5^2+12^2 >> 25+144 = 169 >> 13
jadi panjang AD = 13 cm