Jawabanmu

2014-03-23T18:47:22+07:00
<A + 4<A = 180
5<A = 180
<A = 180/5 = 36

sudut pelurus A = 4<A = 4.36 = 144
2014-03-23T18:49:15+07:00
180 - <A = 4<A
180 = 4<A + <A
180 = 5<A
<A = 180/5
<A = 36 drajat