1. Angle DOE and EOA=
2.Angle AOB and AOE=
3.Angle EOD and DOC=
nonsense answer=report
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1. Angle DOE and EOA=
2.Angle AOB and AOE=
3.Angle EOD and DOC=
nonsense answer=report
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1. ↑. 2. ↑
3.(i) ∠AOB + ∠BOC = 180°
> 50° + ∠BOC = 180°
> ∠BOC = 180° - 50° = 130°
> ∠BOC = 130°
(ii) ∠EOD + ∠COD = 90°
> ∠EOD + 25° = 90°
> ∠EOD + 25° = 90°
> ∠EOD = 90° - 25°
> ∠EOD = 65°
(iii) ∠BOD = ∠BOC + ∠COD
= 130° + 25° = 205°
(iv) ∠BOD = 360° - ∠BOD
= 360° - 155° = 205°
(v) ∠COE = 360° - ∠COE
= 360° (∠COD + ∠EOD)
= 360° - (25° + 65°)
= 360° - 90° = 270°