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If tangents PA and PB from a point P to a circle with centre O are inclined to each other at angle of `80^@` , then find `angle POA` .

A

`50^(@)`

B

`60^(@)`

C

`70^(@)`

D

`80^(@)`

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The correct Answer is:
A
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PA and PB are two tangents from a point P outside a circle with centre O. If A and B are points on the circle such that angle APB= 80^@ , then angle OAB is equal to: PA और PB केंद्र O वाले वृत्त के बाहर स्थित बिंदु P से निकली दो स्पर्श रेखाएं हैं | यदि A और B वृत्त पर स्थित ऐसे दो बिंदु हैं कि angle APB= 80^@ है, तो angle OAB का मान क्या होगा ?

If PA and PB are tangents drawn from an external point P to a circle with centre O such that angle APB = 70^@ , then angle OAB is equal to: यदि PA और PB एक बाहरी बिंदु P से केंद्र O के साथ एक वृत्त में खींची गई स्पर्श रेखाएँ हैं जैसे कि angle APB = 70^@ तो angle OAB बराबर है:

Two tangents PA and PB are drawn to a circle with centre O from an external point P. If angle OAB= 30^@ , then angle APB is: केंद्र O वाले वृत्त पर एक बाहरी बिंदु P से दो स्पर्श रेखाएँ PA तथा PB खींची जाती हैं | यदि angle OAB= 30^@ है, तो angle APB का मान क्या होगा ?