Tolong jawab no 10
yg a,b,c,d,e,f,g
plese dengan caranya
A.) sudut c = 180-150
= 30
y = 180 -100 -30
y = 50
c.) sudut c = susut b
sudut c = 180 -115
= 65
y + 7 + 65 + 65 = 180
y + 137 = 180
y = 180 -137
y = 43
d.) 11y + 4y = 180
15y = 180
y = 180 /15
y = 12
f.) sudut c = 180 -108 = 72
susut a = 180 – 117 = 63
3 y + 63 + 72 = 180
3y + 135 = 180
3y = 180-135
3y = 45
y = 45/3
y = 15