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# maths question watch

1. Can I ask you a quick question?

A)Find the the equation of the line through the point A(2,6) which is perpendicular to the line PQ whose equation is 2y - x = 5.

B)Find the length of the perpendicular from A to PQ

okay so I got A) to be y=-2x + 10

but for B) I cannot think of what to do

I know we need another set of coordinates but how do we get them? thanks
2. What're coordinates of the intersection between the line perpendicular from A to PQ and the line PQ?
3. (Original post by aznkid66)
What're coordinates of the intersection between the line perpendicular from A to PQ and the line PQ?
(2,6)

these are the only coordinates we have been given
4. That's the coordinates of A. You're supposed to interpret my questions as hints.

You can draw a line segment from A perpendicular to PQ. This line segment can be extended into a line. What is the equation of this line?

What is the equation of the line PQ?

Hence, how do you find the intersection of these two lines, knowing their equations?

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Updated: March 24, 2013
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