Tuesday, 2 October 2012

Tuesday, 25 September 2012


Here are some information about the paper:

Duration: 2 hr 30 min
Total marks: 100

40% of paper on Term 1 and 2 topics:
  • Algebra and algebraic fractions
  • Linear graphs
  • Quadratic equations and graphs
  • Area, perimeter, volume and surface area
  • Pythagoras' Theorem
  • Indices

60% of paper on Term 3 and 4 topics:
  • Standard form
  • Congruence and Similarity
  • Area and volume of similar figures and solids
  • Basic trigonometry
  • Matrices
  • Probability
  • Simultaneous equations and graphs
  • Set notation and venn diagrams
  • Direct and inverse proportion

Set Language : Class CN-ECT activity

S205 Responses

Do you agree with your friends' responses?
Some said F = J while others disagree? Comment.

Wednesday, 5 September 2012

Proportion: Direct and Inverse Answer Key

Construction 2



Perpendicular Bisector

DOWNLOAD Mathematica NotebookPerpendicularBisector

A perpendicular bisector CD of a line segment AB is a line segment perpendicular to AB and passing through the midpoint M of AB(left figure). The perpendicular bisector of a line segment can be constructed using a compass by drawing circles centered at A and Bwith radius AB and connecting their two intersections. This line segment crosses AB at the midpoint M of AB (middle figure). If the midpoint M is known, then the perpendicular bisector can be constructed by drawing a small auxiliary circle around M, then drawing an arc from each endpoint that crosses the line AB at the farthest intersection of the circle with the line (i.e., arcs with radii AA^' and BB^'respectively). Connecting the intersections of the arcs then gives the perpendicular bisector CD (right figure). Note that if the classical construction requirement that compasses be collapsible is dropped, then the auxiliary circle can be omitted and the rigid compass can be used to immediately draw the two arcs using any radius larger that half the length of AB.Angle Bisector

DOWNLOAD Mathematica NotebookAngleBisector
The (interior) bisector of an angle, also called the internal angle bisector (Kimberling 1998, pp. 11-12), is the line or line segment that divides the angle into two equal parts.

 A. Constructing Perpendicular Bisector  

B Angles Bisector 

Monday, 27 August 2012

Direct and Inverse Proportion

Task 1 Part 1: Explore the following graphs or information given and observe the following: .1 patterns or repeated behaviours .2 the variables exist in the information eg. time is changing .3 the relationship between the variables .4 is there a factor for change eg. values are tripled
 Comment as a post
information 1
information 2
information 3
information 4
information 5

Task 2: watch the following videos