Jawabanmu

2014-06-01T09:57:50+07:00
Sudut A + B = 180
2a + 3a = 180 --> 5a = 180
a = 36
sudut a = 2(36) = 72
sudut b = 3(36) = 108

sudut c =6x-18, sudut d = 5y - 2
jumlah sudut jajargenjang = 360
sudut t a + b + c + d =360
72 + 108 + 6x - 18 + 5y - 2 = 360
180 + 6x + 5y -20 = 360
6x + 5y = 200

sudut c = 180- sudut b
6x - 18 = 180 - 108
6x - 18 = 72
6x = 90
x = 15

sudut d = 180 - sudut a
5y - 2 = 180 -72
5y - 2 = 108
5y = 110
y = 22

x+y = 37