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In the figure, TP and TQ are tangents to the circle at P and Q respectively. If N is a point on the minor arc PQ and
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|dw:1360250803168:dw|
See, N can be anywhere on the arc, it doesn't matter , since angle PNQ will always be the same. right ?
yes
Let us take it on the line joining center O and T
|dw:1360251005574:dw|
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why there is an right angle?
perpendicular?
angle between radius and tangent is 90 degrees, isn't it ?
yes...
|dw:1360251088712:dw|
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