B3. 1) ∠AOB = 150°, ∠COD, ∠BOD, ∠AOC - ?

Question

1. ∠AOB = 150°. ∠AOC = 20°, ∠BOD = 40°.
2. ∠AOB = ∠AOC + ∠COD + ∠BOD.
3. 150° = 20° + ∠COD + 40°. ∠COD = 150° - 60° = 90°.

Accepted Answer

1. ∠AOB = 150°. ∠AOC = 20°, ∠BOD = 40°.
2. ∠AOB = ∠AOC + ∠COD + ∠BOD.
3. 150° = 20° + ∠COD + 40°. ∠COD = 150° - 60° = 90°.

Ответ: