Day: January 25, 2016

GEOMETRY

Mathematical terminologies

  • Point:
    • The basic element of geometric figure
    • All other geometrical figure are made up of a collection of points
    • Normally use capital letter (A, B, …)
  • Line:
    • Collection of points going on and on infinitely in both directions. No endpoints.
    • Vertically, diagonally and horizontally
    • Has arrows on the end
    • Named by a single lower case letter (a, b, …)
  • Line segment:
    • Part of line. It has two endpoints and include all the points between those endpoint.
    • Vertically, diagonally and horizontally
    • Points at the end
    • Named bu the capital letter end point
  • Ray:
    • Part of line. Has one endpoint and continues on and on in one directions
    • Vertically, diagonally and horizontally
    • A point at one and and an arrow at the other
    • Named by saying the end point first and then say the name of one other point on the ray
  • Collinear point: Points which lie in a straight line
  • Concurrent line: Three or more line all passing through a common point
  • Perpendicular line: Special intersecting line that form right angle where they intersect
  • Parallel line:  Lines which extend in the same direction and remain the same distance apart
  • Angle: When two lines meet together
  • Cartesian plane:
    • Plane for draw coordinate
    • Horizontal: x-axis
    • Vertical: y-axis
    • Point of intersection of the axis: 0
  • x-axis: abscissa
  • y-axis: ordinate

UNIT 3: BASIC GEOMETRY – CHAPTER 8: THE NUMBER PLANE

Chapter contents

8:02  Coordinates and the number plane

Learning outcomes

Students will be able to graph and interpret linear relationships on the number plane.

Explanation

Coordinates and the number plane

Cartesian plane or number plane is a plane to draw coordinates. The horizontal line is called as X-axis and the vertical line is y-axis. The point of intersection is 0.

376px-2D_Cartesian_Coordinates.svg

snip_20151210133851

 

Let’s do some exercises

  1. Plot the points given.

(3, 7) (-1,1) (-5. 7) (3, 9)

snip_20151210134833

2. Plot the points given and join them in the order given:

(1, -1) (1, 3) (3, 3) (3, -1)

snip_20160125195349

So that’s all that I can tell you about Chapter 8: the number plane. Thank you for reading.

References: Mcseveny, A., Conway, R., Wilkes, S., & Smith, M. (2007). International Mathematics 2 for the Middle Years. In A. Mcseveny, R. Conway, S. Wilkes, & M. Smith, International Mathematics 2 for the Middle Years (pp. 182-185). Pearson Australia.