Ellipse 3 Question 2

2. The orthocentre of the PAB is

(a) 5,87

(b) 75,258

(c) 115,85

(d) 825,75

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Answer:

Correct Answer: 2. (c)

Solution:

  1. Equation of AB is

y0=85953(x3)=824(x3)=13(x3)x+3y=3

Equation of the straight line perpendicular to AB through P is

3xy=5

Equation of PA is 2x3=0

The equation of straight line perpendicular to PA through B95,85 is y=85.

Hence, the orthocentre is 115,85.



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