Jawabanmu

2014-09-07T19:43:03+07:00
AD=√16²+12²
AD=√256+144
AD=√400
AD= 20
2014-09-07T19:50:01+07:00
AC² + AB² = AD²
(16)² + (12)² = 256 + 144 = 200
√400 = 20
AD = 20