
Subscribe to our Youtube Channel - https://you.tube/teachoo
Last updated at May 29, 2018 by Teachoo
Transcript
Example 4 Three points P (h, k), Q (x1, y1) and R (x2, y2) lie on a line. Show that (h x1) (y2 y1) = (k y1) (x2 x1). Since 3 points P, Q and R are collinear So, Slope of QP = Slope of RQ We know that slope of a line passing through (x1, y1)(x2, y2)is m = ( _2 _1)/( _2 _1 ) Now, Slope of QP = Slope of RQ ( _1 )/( _1 ) = ( _2 _1)/( _2 _1 ) (k y1) (x2 x1) = (h x1) (y2 y1) (h x1) (y2 y1) = (k y1) (x2 x1) Hence proved
Examples
Example 2
Example 3 Important
Example 4 You are here
Example 5
Example 6 Important
Example 7
Example 8
Example 9 Important
Example 10
Example 11
Example 12
Example 13 Important
Example 14 Important
Example 15 Important
Example 16
Example 17
Example 18
Example 19
Example 20
Example 21 Important
Example 22 Important
Example 23
Example 24 Important
Example 25 Important
About the Author