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How to construct Tangents to circle if center of circle is not given?
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If center of the circle is not given -
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Ex 11.2, 7
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We find its center first by

- Taking any two non-parallel chords
- And then finding the point of intersection of their perpendicular bisectors.
- Point of intersection of perpendicular bisectors is the center of circle

Then you could proceed as
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Construction 11.3
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.