Coordinate Geometry Flashcards
1
Q
Equation of a straight line
A
y=mx+c
2
Q
Length of a line segment
A
________________
/(x2-x1)+(y2-y1)
3
Q
Gradient of a line
A
y2-y1/x2-x1
4
Q
Midpoint of a line
A
(x1+x2/2 , y1+y2/2)
5
Q
Equation of a straight line
A
Find the gradient
Find the value of the c
Rewrite the values of m and c in the equation y=mx
+c
6
Q
Equation of parallel lines
A
They have the same gradient
7
Q
Equation of perpendicular lines
A
The gradient is the negative reciprocal of each other
8
Q
Equation of perpendicular bisector
A
Find the gradient of the original line
Ind the gradient of the perpendicular line
Find the midpoint of the perpendicular line
Find the y-intercept of the perpendicular line using the midpoint coordinates
Substitute the values in the equation y=mx+c
