[tex]\boxed{\boxed{\bold{\bigstar Pembahasan\bigstar}}}[/tex]
ΔABC memiliki ∠A = 20°, ∠B = 3a°, ∠C = 40°
Ingat!∠A + ∠B + ∠C = 180°
Maka :
2° + 3a° + 40° = 180°
3a° = 180° - 40° - 2°
3a° = 138°
a° = 138° : 3
a ° = 46°
Apabila ∠A = 20°, maka : (apabila typo dalam menulis soal)
20° + 3a° + 40° = 180°
3a° = 180° - 40° - 20°
3a° = 120°
a° = 120° : 3
a° = 40°
#KucingOren
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[tex]\boxed{\boxed{\bold{\bigstar Pembahasan\bigstar}}}[/tex]
ΔABC memiliki ∠A = 20°, ∠B = 3a°, ∠C = 40°
Ingat!
∠A + ∠B + ∠C = 180°
Maka :
2° + 3a° + 40° = 180°
3a° = 180° - 40° - 2°
3a° = 138°
a° = 138° : 3
a ° = 46°
Apabila ∠A = 20°, maka : (apabila typo dalam menulis soal)
20° + 3a° + 40° = 180°
3a° = 180° - 40° - 20°
3a° = 120°
a° = 120° : 3
a° = 40°
#KucingOren