This document provides an introduction to coordinate geometry. It defines coordinate geometry as the study of algebraic equations on graphs using an x- and y-axis. It explains that a Cartesian plane consists of two perpendicular number lines that intersect at zero and divide the plane into four quadrants. It discusses concepts like slope, inclination, y-intercept, horizontal and vertical lines, collinear points, medians, incentre, excentre, circumcentre, and orthocentre.
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3. Western Europe. Analytic geometry was independently invented by
Ren辿 Descartes and Pierre de Fermat, although Descartes is
sometimes given sole credit. Cartesian geometry, the alternative
term used for analytic geometry, is named after Descartes. ... Pierre
de Fermat also pioneered the development of analytic geometry.
4. The definition of coordinate geometry is the study of
algebraic equations on graphs. An example of coordinate
geometry is plotting points, lines and curves on an x and y
axis.
Introduction
5. A Cartesian plane
consist of two mutually
perpendicular number
lines intersecting each
other at their zero.
6. As shown in the
adjoining diagram,
the coordinate axes
divide a coordinate
plane into four
parts which are
known as
Quadrants.
7. The angle which a
straight line makes
with the positive
direction of x-axis(
measured in anti-
clockwise
direction) is called
inclination of the
line.
8. If is the
inclination of a
line; the slope of
the line is tan
and is usually
denoted by letter
m,
9. If a straight line
meets y axis at a
point ,the distance
of point from the
origin is called
Y-intercept .
10. Horizontal and Vertical lines
The gradient of horizontal line
is zero.
(horizontal line is flat No slope)
The gradient of a vertical line is
infinity.
(Vertical line gradient is
maximum.)
11. The positive of any
point in the
Cartesian Plane can
be determined by its
distance from each
axes.
12. Collinear point
*Point are collinear if they al lie on the same line
*You need to establish that they have
-a common direction
-a common point
13. Median
A median is
the line that
joins a vertex
of a triangle to
the midpoints
of the opposite
side.