C1
Topic 3:
Coordinate geometry
Summary of the formulae
Use the displays to summarise the formulae and methods that you should know.
A line with given gradient, m, and a point on it (x
1
,y
1
)
Enter gradient, m, and coordinate values (x
1
,y
1
):
m:
x
1
:
y
1
:
slope:
y-intercept:
line:
simplified:
gradient of perpendicular:
A line with two given points on it (x
1
,y
1
) and (x
2
,y
2
)
Enter coordinate values (x
1
,y
1
) and (x
2
,y
2
):
x
1
:
y
1
:
x
2
:
y
2
slope:
slope simplified:
y-intercept:
line:
line simplified:
gradient of perpendicular:
coordinates of midpoint:
simplified:
Summary
In order to save time in exams you must spot when formulae are useful - so you must memorise them!
©
MathsNet
2001
©
MathsNet 2001