Answer:
10. <G = 75, <H = 60, <J = 45
11. <Q = 98, <P = 191, <QRP = 27
12. <ECB = 136, <BCD 81, <DCE = 180-65-60 = 55
13. <K=70, <L = 90, <KML = 30, <LMN = 150
Step-by-step explanation:
1st one: 12x = 180
x = 15
<G = 75, <H = 60, <J = 45
2nd one: <R = 180-153 = 27
27 + 3y + 5 + 2y - 7 = 180
5y + 25 = 180
5y = 155
y = 31
<Q = 98, <P = 191, <QRP = 27
3rd one:
<BCA = 180-78-58 = 44
<DCE = 180-65-60 = 55
<BCD = 180-99 = 81
<ECB = 180-44 = 136
4th one:
6x=180
x = 30
<K=70, <L = 90, <KML = 30, <LMN = 180-30 = 150
