pliss ya tolong no 8,9, & 10 MTK

8.
2+7 = 180° (karena pelurus)
9 = 180°
1 = 20°
2 = 40°

9.
P3 dan Q2

10.
105+3a = 180
3a = 180-105
3a = 75
a = 25
3a = 3b
a = b
b = 25

a+b = 25+25= 50