The Equation of a Straight Line & Parallel and Perpendicular Lines Flashcards Preview

Maths > The Equation of a Straight Line & Parallel and Perpendicular Lines > Flashcards

Flashcards in The Equation of a Straight Line & Parallel and Perpendicular Lines Deck (3):
1

What are the three equations that can be used to describe a straight line?

- y-b = m(x-a) for point (a,b) on the line
- y = mx+c
-ax+by+c = 0 where a, b and c are integers

2

What is the equation for the midpoint of a line segment?

Midpoint of the line (ab) = ((xa+xb)/2 , (ya+yb)/2)

3

How do you find the length of a line segment?

Pythagoras' Theorem: length of line (ab)^2 = (xb-xa)^2 + (yb - ya)^2