Question

안녕하세요.. (≡^∇^≡)
Answer this please..help
*puppy eyes*.... I will mark you as Brainliest.. and also no spams please.. I will report..
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Answer 1

$\purple{\bigstar} 당신이 괜찮기를 희망합니다 !!!$ヅ

$\underline{\textbf{Solution:-}}$

Topic - Circle

$\bold{\underline{Given:- }}$

• ∠OAC = 30°

$\bold{\underline{Find:-}}$

1. ∠OCA
2. ∠AOC
3. ∠COB

_________________

$\underline{\sf{1. Finding \: ∠ OCA :- }}$

$\bold{∠ ACO = ∠ OAC}$

$\implies\: \underline{\boxed{\bold{\green{∠ OCA = 30°} }}}$

$\underline{\sf{2. Finding \: ∠ AOC :- }}$

$\bold{In\: ∆AOC , \:by \:Angle \:sum \:property}$

$\bold{∠OAC + ∠ACO + ∠AOC = 180°}$

$\bold{30° + 30° + ∠AOC = 180°}$

$\bold{∠AOC = 180 - 60°}$

$\implies\:\underline{\boxed{\bold{\green{∠AOC = 120°}}}}$

$\underline{\sf{3. Finding \: ∠ COB :- }}$

$\bold{∠COB + ∠AOC = 180°}$[Supplementary Angle]

$\bold{∠ COB = 180° - 120° }$

$\implies\: \underline{\boxed{\bold{\green{∠ COB = 60° }}}}$

•••♪♪•••

@itzMeGunjan