The document discusses the Cartesian coordinate system, which was created by René Descartes. It is a system that uses perpendicular x and y axes to uniquely identify points in a plane by their coordinates. Examples are given of plotting points and finding the area of a rectangle using this coordinate system. The key parts of the Cartesian plane like the quadrants and axes are identified. Exercises involving the coordinate system are provided from a textbook.

1. https://mrnussbaum
.com/stock-the-
shelves-online-game

3. • What do you call the
figure on the screen?
• Can anyone identify
the different parts of
the figure? How can
we use it?

5. • Also known as Cartesian coordinate system
named after the famous French philosopher and
mathematician Rene Descartes. It is a system
coordinate axes.

10. Examples
Example:
• An ordered pair (4, 5) represents point 4 units to the
right of the origin in the direction of the x-axis, and 5
units above the origin in the direction of the y-axis as
shown in the diagram below.

11. Example:
• Plot the point (–5, 4) and identify which
quadrant or axis it is located.

12. •Sketch rectangle ABCD with
the given vertices and find
its area.
𝐴 −2, −3 , 𝐵 5, −3 ,
𝐶(5,4), 𝐷(−2,4)

13. Give the parts
of a Cartesian
coordinate
Plane

14. Examples

15. Answer: Solve the
exercises on
Rectangular
Coordinate System on
p.166-167

17. “I think; therefore I am.”
- René Descartes

19. Answer POWERPLUS
page 18 (Letters B-C
only).