Thursday, 28 July 2016

Treasure Hunting with Geometrical Constructions

Note: This activity was conducted on 28 July.
It is shifted up (above other posts) for the ease of discussion.

You are going to work in the AA2 groups.



There are 2 parts to this mission.
1. Given the map, locate the location where the QR Code to the treasure is hidden.
2. By reading the QR Code, you will be lead to solve a problem.
3. Post the complete worked solution in the blog.

The group will receive the treasure if the answers are correct.

At the end of the lesson, the maps from all members must be submitted.


The following link will only be activated after all answers from all the groups are posted in the Maths Blog - after 5 pm today.

Part 2: Click HERE to access the questions.




Click HERE to access the photos

Treasure C




Feedback: 
Good. You've shown with working how the problem can be solved without the use of graph. 
Note that the plotted graph can only be used as a reference.
It would be better if you re-write the working clearly using INK and insert in this post. 

Treasure A Findings (by Group 2)

(a)   the coordinates of the point A:
Ans: (0,4)


(b)  the gradient of the line:
Ans: (-1.5)


Feedback: 
Rewrite the working (have the steps clearly presented) and update it in this blog post

CAWN Treasure E

a) 0.5, 3
b) Gradient = 2
c) y=2x+4

Feedback:
The coordinates of the point must be presented with the ( )

Treasure F by Group 1


By group 1

Feedback: 

You found the equation of the original line in teh form of y = mx + c.
However, you have not written down the equation of the mirror image.
The question did not ask for a sketch. 

Update this post with the correct answer.

[Classwork] Geometrical Construction: Equilateral Triangle

Construction with construction lines clearly shown.
(by Matthew)


Assignment 9.5: What's Wrong?




Click HERE to access the responses

Thursday, 14 July 2016

Testing Your Eye Power....

Look at the image... and draw out as much information as possible!
Use words that are related to Geometrical Construction to describe what you see....


COLLECTION 1 - Spot the Error(s): Perpendicular Bisector Q1 - Groups 4 & 5

As a group, watch the clip and try to spot as many errors as possible.  Post your observations under "Comments".

COLLECTION 1 - Spot the Error(s): Perpendicular Bisector Q2 - Groups 3 & 6

As a group, watch the clip and try to spot as many errors as possible.  Post your observations under "Comments".

COLLECTION 1 - Spot the Error(s): Perpendicular Bisector Q3 - Groups 2 & 7

As a group, watch the clip and try to spot as many errors as possible. 
Post your observations under "Comments".
 

COLLECTION 1 - Spot the Error(s): Perpendicular Bisector Q4 - Groups 1 & 8

As a group, watch the clip and try to spot as many errors as possible.
Post your observations under "Comments".


COLLECTION 2 - Spot the Error(s): Angle Bisector Q1 - Groups 4 & 5

As a group, watch the clip and try to spot as many errors as possible.
Post your observations under "Comments".

COLLECTION 2 - Spot the Error(s): Angle Bisector Q2 - Groups 3 & 6

As a group, watch the clip and try to spot as many errors as possible.
Post your observations under "Comments".

COLLECTION 2 - Spot the Error(s): Angle Bisector Q3 - Groups 2 & 7

As a group, watch the clip and try to spot as many errors as possible.
Post your observations under "Comments".


COLLECTION 2 - Spot the Error(s): Angle Bisector Q4 - Groups 1 & 8

As a group, watch the clip and try to spot as many errors as possible.
Post your observations under "Comments".
 

Having Fun with Construction!




How to construct the holographic pyramid?





Load the Hologram clip in your mobile device (click HERE).
Place your "product" on top of the screen and enjoy!.....

Wednesday, 13 July 2016

Differentiating the right from the wrong.... But What's Wrong?

On your own, 
1. Examine the 3 workings and identify which is the correct working. 
Indicate clearly in the Comments.

2. Explain what goes wrong in each of the two other working.

Key in your responses in "Comments"


Understanding Y = mX + c through Ink Splats!

In your group, describe how you could solve the problem.
Post your answer in the designated slide. 
Click HERE




Click HERE... [only accessible to teacher]

Friday, 8 July 2016

Gradient - Understanding the Formula

Linear Graphs: Key Ideas

Application of GRADIENT and Y-INTERCEPT

Dear S1-01


Activity 1: What makes up the linear equations?

Click HERE to access the game.

Before you begin with the game, click at INSTRUCTIONS (at the bottom of the page) to learn what each of the following mean:
(i) y-intercept - usually denoted by "c"
(ii) rise/ run, a formula that is used to calculate the slope (gradient) - usually denoted by "m"
(iii) a straight line path can be described with the linear equation, Y = mX + c 
You need to understand the above in order to accomplish the mission




Graph Plotting: Let's grade this piece of work!

Let's assess this graph and point out what are the missing/ redundant components in this graph.
On your own.... List them in points under comments.




Click HERE to access.

Thursday, 7 July 2016

Assignment 9.1 Q3 - Different Methods to solve the problem





Look at the methods presented below... They are, all, technically correct - solved by different methods. 
Can you figure out the train of thought for each of these methods?
Note: Some of these "answers" are not fully 'correct' because some aspects are not corrected presented. Can you tell what's wrong?

Method 1:



Method 2:



Method 3:

Error Analysis: Marking Scales

Note: This set of slides will be made viewable after the class discussion.

Drawing Linear Graphs

For clarity in illustration, ink is used in this 'demonstration'.
You should use a sharp pencil, and ruler to plot your graph. Always get ready an eraser to clean off any irrelevant markings.

Step 1: How do we decide where to place the axes?
  • Do you "know" the graph paper?
  • What would you make reference to?


Step 2: Scale matters!
  • The numbers on the axes must be clearly marked.
  • The scale should be written on the top right corner of the graph paper.


Step 3: Let's start plotting!

  • Mark the points clearly with "X"
  • Join the points with a straight line (use a long ruler!)
  • The line should be drawn within the given domain