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  • Let A (4, 2), B(6, 5) and C(1, 4) be the vertices of D ABC.Find the coordinates of the point P on AD such that AP : PD = 2 : 1

7.(ii)   Let A (4, 2), B(6, 5) and C(1, 4) be the vertices of D ABC. Find the coordinates of the point P on AD such that AP : PD = 2 : 1

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best_answer

From the figure,

The point P divides the median AD in the ratio, AP : PD = 2 : 1

Hence using the section formula,

P(x,y)= \left (\frac{m_{1}x_{2}+m_{2}x_{1}}{m_{1}+m_{2}} , \frac{m_{1}y_{2}+m_{2}y_{1}}{m_{1}+m_{2}} \right )

P(x,y)= \left (\frac{2\times\frac{7}{2}+1\times4}{2+1} , \frac{2\times\frac{9}{2}+1\times2}{2+1} \right ) = \left ( \frac{11}{3}, \frac{11}{3} \right )

Posted by

Divya Prakash Singh

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