BANTU BUTUH BANGET KAKAK
Jawaban:
3. a) 5a° + 3a° = 180°
8a° = 180°
a = 180°8 = 22,5°
b) <DBC = 5a° = 5 (22,5)° = 112,5°
4. a) (3a° + 60°) + 20° = 180°
3a° = 180° - 60° - 20°
3a° = 100°
a° = 100°/3
a° = 33 1/3 ° = 33, 33°
b) <KLM = 3a° + 60°
= 3(33,33)° + 60°
= 99,99° + 60°
= 159,99°
= 160°
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