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CBSE Class 10 Answered

ab is a chord of length 16cm of a circle of radius 10 cm .the tangents at a and b intersect at point p.find the length of pa     ....Please solve it by Pythagoras theorem 
Asked by charanjotkaur34 | 13 Feb, 2018, 11:13: PM
answered-by-expert Expert Answer
 
 
begin mathsize 16px style OA equals 10 space cm ON perpendicular AB AN equals NB equals 16 over 2 equals 8 space cm Pythagoras space theorem In space increment ONA comma ON squared plus NA squared equals OA squared ON squared equals OA squared minus NA squared ON squared equals 10 squared minus 8 squared ON squared equals 36 space cm ON equals space 6 space cm tan space angle AON equals AN over ON equals 8 over 6 equals 4 over 3 increment OAP tan angle AON equals PA over OA 4 over 3 equals PA over 10 rightwards double arrow PA equals 40 over 3 space cm end style
Answered by Sneha shidid | 14 Feb, 2018, 11:23: AM

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