Ansr the elevnth nd twlth qstn pls
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11. Triangle APB is isosceles since PA = PB
So, Angle PAB = (180 - 50)/2 = 65°
Also, Angle OAP is right angled
Therefore Angle OAB = 90-65 = 25°
12. Angle OPT is right angled
Therefore Angle OPQ = 90-60 = 30°
Triangle POQ is isosceles since OP=OQ, both radius
So, Angle POQ = 180 - 2×30 = 120°
Now, Angle PRQ = Angle POQ = 120°
So, Angle PAB = (180 - 50)/2 = 65°
Also, Angle OAP is right angled
Therefore Angle OAB = 90-65 = 25°
12. Angle OPT is right angled
Therefore Angle OPQ = 90-60 = 30°
Triangle POQ is isosceles since OP=OQ, both radius
So, Angle POQ = 180 - 2×30 = 120°
Now, Angle PRQ = Angle POQ = 120°
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