Respuesta :

Answer:

<DOC = <AOB =50* as opposite angles.

<DOE + <DOC + <EOA = 180*, thus <EOA = 180-50-60 =70*.

<COB + <AOB = 180*, thus <COB = 130*.

// Central angles equal the arcs they rely on.

Arc AE = <EOA = 70*.

Arc AB = <AOB = 50*.

Arc ECB = <EOD + <DOC + <COB = 60+50+130 = 240*.

Arc BOC = <COB = 130*.