tolong bantu jawab nomor lima bagian a dan b ( besar ABD dan DEG ) terimakasih (sertakan cara yaa

a) Tentukan a, b, c, d

3a + a = 180°
4a = 180°
a = 180° : 4
a = 45°

b + b + b = 180°
3b = 180°
b = 180° : 3
b = 60°

3c + 45° + 30° = 180°
3c + 75° = 180°
3c = 180° - 75°
3c = 105°
c = 105° : 3
c = 35°

4d + 60° + d = 180°
5d + 60° = 180°
5d = 180° - 60°
5d = 120°
d = 120° : 5
d = 24°

b) Sudut ABD, DEG, PQS, KLN

Sudut ABD:
3a = 3(45°) = 135°

Sudut DEG:
b + b = 60° + 60° = 120°

Sudut PQS:
3c + 45° = 3(35°) + 45° = 105° + 45° = 150°

Sudut KLN:
4d + 60° = 4(24°) + 60° = 96° + 60° = 156°