Question

(AOB) +(BOC) +(COD) +(DOE)

Answer 1

Answer:

Adding (1) and (2), we get

 

∠AOB + ∠BOC + (∠COE + ∠DOE) + ∠AOD = 180° + 180°

 

⇒ ∠AOB + ∠BOC + ∠COD + ∠DOA = 360°  (∠COE + ∠DOE = ∠COD)

Step-by-step explanation:

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