prove theorem 10.1 and 10.2 of ncert text book page number 208 and 211 respectively
Dear Student,
Refer the following links :
https://www.meritnation.com/ask-answer/question/the-tangent-at-any-point-of-a-circle-is-perpendicular-to-the/math/8977435
https://www.meritnation.com/ask-answer/question/how-to-prove-that-the-length-of-tangents-drawn-from-an-exter/circles/1465554
Hope this would clear your doubt.
Do let us know in case of any further concerns.
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Refer the following links :
https://www.meritnation.com/ask-answer/question/the-tangent-at-any-point-of-a-circle-is-perpendicular-to-the/math/8977435
https://www.meritnation.com/ask-answer/question/how-to-prove-that-the-length-of-tangents-drawn-from-an-exter/circles/1465554
Hope this would clear your doubt.
Do let us know in case of any further concerns.
Regards