**interior angle**and

**exterior angle?**

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Reference: Study Notes (p12)

What general formula can you conclude from the above - to find**sum of interior angles of a ***n-gon* ?

What general formula can you conclude from the above - to find

Reference: Study Notes (p12): On the given handout...

**Post lesson discussion **- after the "cutting"/ "tearing" exercise:

**Sum of Exterior angles of a Polygon = 360 degrees [sum of angles at a point]**

Attempt this quiz to check well well you know these quadrilaterals

http://www.onlinemathlearning.com/quadrilateral-properties.html

*More about diagonals:*

http://www.onlinemathlearning.com/quadrilateral-properties.html

A **diagonal** is a line joining two nonconsecutive vertices of a polygon or polyhedron.

(source: http://en.wikipedia.org/wiki/Diagonal)

Read more about*diagonals* at the source.

(source: http://en.wikipedia.org/wiki/Diagonal)

Read more about

Please note that the following have been uploaded to the GoogleSite - for your reference & practice:

**GoogleSite > Mathematics > Class page > Folder: 02 Revision**

*Note that we will not be printing this revision paper for you.*

Today, we started the topic by understanding the vocabulary of Geometry - some commonly used words related to the topic and what they mean.

__Homework__ - after going through the above, attempt the 1st sheet of homework (Unit 13.1 Basic Geometry)

Preparation for the next lesson:

@GoogleSite

- Introduction: The Geometry and Art of Architecture
- Note that there's a G+ activity at the end of this page
- 1. Line Segment
- 2. Angles and Angle Properties

Do on this sheet of paper, at the spaces available.

For Q5,

- Form an equation with the unknowns and the given angles
- remember to write down the reasons
- Refer to the lesson in GoogleSite on how to present the working properly.

As iterated in class (many times), it is important for us to present our working clearly so that whoever reading your working (and answers) is able to understand your train of thoughts. In addition, proper working presentation is also a demonstration of your understanding of concepts.

Below is a guide (by Mr Desmond Peh) on how you should present your working, especially when answering to word problems.

Below is a guide (by Mr Desmond Peh) on how you should present your working, especially when answering to word problems.

- By the way, can you spot one part of the working that could be further improved?

Study Notes (p19): Challenge (Tier C)

Here are some additional information on the discussion:

Here are some additional information on the discussion:

- Lightning Safety during Outdoor Sports
- Facts about Lightning - Safety Tips for the Mariner [Fact Sheet]

Which media does sound travel fastest in?

- Vacuum? Air? Water? Solid?

This was the working presented by Prateek (Gruop 4)

__Point to Ponder__: Do you know the assumption he made when he worked out the interest?

The__Question__ is: Does the answer applies to if the duration is extended to 5 or 10 years?

Now, if you work with the unknown (i.e. using Algebra), when the computation takes into consideration any*duration *(i.e. T)

The

Now, if you work with the unknown (i.e. using Algebra), when the computation takes into consideration any

Please see below, the suggested way of solving the problem (using algebra, right from the start).

This would be a good strategy, especially**if you are required to SHOW **the answer is 40/89

While by substituting numbers work (as most of you have attempted in that manner), you would notice that you could substitute different sets of numbers in the expression, and yet you still get 40/89; then how would you explain that?

(there's where algebra comes in to help generalise their explanation....)

This would be a good strategy, especially

While by substituting numbers work (as most of you have attempted in that manner), you would notice that you could substitute different sets of numbers in the expression, and yet you still get 40/89; then how would you explain that?

(there's where algebra comes in to help generalise their explanation....)

Homework - for tomorrow's discussion:

Study notes: p5 to p9

Study notes: p5 to p9

- Class Work 1 (Tier A)
- Class Work 2 (Tier B)
- Class Work 3 (Tier B)
- Class Work 4 (Tier C)

Re: Reschedule of assessment for those who are unable to turn up on 18 July (1.30 pm)

Hi Everybody

As you did not turn up for the summative assessment on Friday 1.30 pm (for various reasons), I've re-scheduled you to take the assessment on

Day/ Date: MONDAY 21 July

Time: 3 pm

Venue: S1-01 classroom

Remember to bring along your calculator.

The maximum duration of the paper is about 30 minutes.

You may leave immediately when you finish the paper.

With regards

Ms Loh

**Who needed to attend:**

Hi Everybody

As you did not turn up for the summative assessment on Friday 1.30 pm (for various reasons), I've re-scheduled you to take the assessment on

Day/ Date: MONDAY 21 July

Time: 3 pm

Venue: S1-01 classroom

Remember to bring along your calculator.

The maximum duration of the paper is about 30 minutes.

You may leave immediately when you finish the paper.

With regards

Ms Loh

5 | NISHTHA GUPTA |

10 | JOHAN SOO |

11 | JOSHUA WEE YU SHUEN |

12 | KAUNG HTET WAI YAN |

19 | TEO MING RUI XAVIEN |

23 | YAP CLEMENT |

24 | WEE WEI SAN JUSTIN* |

In the last lesson, we discussed "Inverse Proportion" and did 2 examples

Below is what we discussed, and how we should present our working:

Below is what we discussed, and how we should present our working:

Refer to the set of Homework issued.

Attempt the 1st sheet only (with 2 pages) - on Direct Proportion.

Remember to present your working clearly, stating the relationship, followed by the equation (with k as the constant).

To be completed and submitted in the next lesson.

Attempt the 1st sheet only (with 2 pages) - on Direct Proportion.

Remember to present your working clearly, stating the relationship, followed by the equation (with k as the constant).

To be completed and submitted in the next lesson.

During the lesson, as an introduction, you were asked to enter 2 groups of equations into "Grapher" to observe the characteristics of each group of graphs, i.e. similarities (within the group of lines) and differences (between the lines in Groups 1 & 2).

Here are the 2 groups of equations:

Group 1: Equations that demonstrate direct proportion

Group 2: Equations that demonstrate inverse proportion

Group 1 graphs look like this:

Group 2 graphs look like this:

Here are the 2 groups of equations:

Group 1: Equations that demonstrate direct proportion

Group 2: Equations that demonstrate inverse proportion

Group 1 graphs look like this:

Group 2 graphs look like this:

Click HERE to view the Playlist that explains the solutions to the question by parts:

Here the two versions of Frequency Table & Histogram presented by some of you.

For your reference.

**Version 1**

**Version 2**

You may click HERE to view the spreadsheet on how to calculate the frequency within the range.

For your reference.

You may click HERE to view the spreadsheet on how to calculate the frequency within the range.

[Study Notes Class Work Tier A Q2 & Q3 (p18)]

Click HERE to access the spreadsheet for the questions.

Click HERE to access the spreadsheet for the questions.

- You will not be able to edit this file.
- Go to FILE > MAKE A COPY to save a copy of the spreadsheet into your GoogleDrive.
- Rename it as "
**Data Handling (Study Notes) P18Q2Q3**". - You are going to apply a few functions that would aid you to compute the mean, median and mode.

[Study Notes: p10]

Here's another way that a Frequency Table may look like:

This is how the histogram looks like

**Homework**

Here's another way that a Frequency Table may look like:

- Preparation for next lesson's discussion: Mean, Median, Mode
- p16-p17: Read through what Mean, Median, Mode are
- p17-p19: Attempt Tier A (Q1 to Q3) and Tier B (Q1 & Q2) questions

During the lesson, we did the following:

**Data Gathering**- when we collected data from each and everyone who's present in the class. Today, we have__20__data points [absent: Jaishree, Min Quan & Prateek]**Tabulation of Data**- we organised the**raw data**in a**frequency table**as shown on the board.__Note 1__: To account for every data point, we 'cancel' off the data point once we noted them in the table.__Note 2__: We add up the numbers in the "Frequency" row to check if it tallies with the total number of data points.

- What you need to do at home: Draw the histogram in the space provided; we'll check the next lesson.
- Indeed, this is about
**Representing data in a statistical representation**. In this case, we are using a**Histogram**

- Homework 6B: Do Question 1 only.

Dear S1-01

As spoken, we'll be having the**Summative Assessments** after school these 2 weeks.

The schedule is as shown:

Please report to the**Seminar Room (**Block C, Level 3, opposite SST Inc) at **1.20 pm** to get ready.

__Muslim boys from S1-04__ will **report at 2.15 pm to the Info Hub**.

**For more information, please refer to the calendar invite.**

**Alternative Assessment/ Performance Task**

**21 - 25 July**

**Level Test 2**

**End-of-Year Examination**

As spoken, we'll be having the

The schedule is as shown:

Please report to the

The following have yet submitted the self-directed learning Homework.

Please submit by Term 3 Week 2.

Please submit by Term 3 Week 2.

2 | BISWAKARMA JAISHREE |

17 | SIDDHARTHA JARUHAR |

23 | YAP CLEMENT |

24 | WEE WEI SAN JUSTIN* |

Here's a summary of Linear Graphs

Here's how you could solve the 4 problems in p29 (Study Notes): [Playlist - 4 clips]

Dear S1-01

In preparation of the Summative Assessment for Linear Graphs, a set of worksheets have been issued to you today (i.e. Homework 8C) - to practice plotting of Graphs.

Complete the tasks and submit it by next Tuesday.

Summative Assessment: Next Week - look out for the date, time and venue by next Monday.

In preparation of the Summative Assessment for Linear Graphs, a set of worksheets have been issued to you today (i.e. Homework 8C) - to practice plotting of Graphs.

Complete the tasks and submit it by next Tuesday.

Summative Assessment: Next Week - look out for the date, time and venue by next Monday.

Dear S1-01

There are 3 pieces of tasks to be completed in the next couple of days before we meet again on next Tuesday.

1. Homework 6A - to be handed in on next Tuesday (8 July)

2. Go through p6 and p7 of the Study Notes and attempt those questions.

Be prepared for discussions - in particular,

There are 3 pieces of tasks to be completed in the next couple of days before we meet again on next Tuesday.

1. Homework 6A - to be handed in on next Tuesday (8 July)

2. Go through p6 and p7 of the Study Notes and attempt those questions.

Be prepared for discussions - in particular,

- the difference between bar Graph & Histogram
- how to read a frequency table

3. Attempt the Activity: **S1 (2014) Statistics Around Us** in the GoogleSite > Maths

Click HERE for the direct link.

You will enter your responses into the GoogleForm at the end of the page.

Alternatively, you can also click HERE to access the form.

Alternatively, you can also click HERE to access the form.

With reference to your study notes (p3-p4),

Describe, based on your observation and understanding,

What are you going to do?

As a group, you are going to 'divide and conquer'.

There are 4 tabs to the spreadsheet. Assign a member to take charge of each type of graph to key in the responses. Be careful not to overwrite each others' entry.

Do*not* click "undo" button.

Click HERE to access the worksheet

Four statistical representations (Pictograms,
Bar Graphs, Pie Charts, Line Graphs) are used to represent a given set of data.

Describe, based on your observation and understanding,

- how each of these representations look like; what are the characteristics of these representations
- how is information represented in these representations; and what kind of information can you draw out from such representations.

What are you going to do?

As a group, you are going to 'divide and conquer'.

There are 4 tabs to the spreadsheet. Assign a member to take charge of each type of graph to key in the responses. Be careful not to overwrite each others' entry.

Do

Click HERE to access the worksheet

Among the 4 graphs (Line Graph, Bar Graphs,
Pictograms, Pie Charts), one of the graphs is NOT appropriate to represent the
information.

· Can you identify the one that is not
appropriate?

· Why do you think it's not appropriate?

·
What makes you
think the 3 remaining graphs are appropriate?

Enter your response in the blog comments, remember to include your group at the end of your posting.

How would you determine if the points A (2, -5) and B (5, 2) lie on the straight line y = 3x - 5?

Key in your responses in "Comments".

Remember to enter your group number.

Key in your responses in "Comments".

Remember to enter your group number.

Describe the various ways that we can use to find out if 3 given points lie on the same straight line.

Key in your responses in "Comments".

Remember to enter your group number.

Remember to enter your group number.

In the following question,

we received the following "answers"

(Ans #1) y =*x + *4

(Ans #2)*x *= 0

Would you accept the above answers (Ans #1 , Ans #2)

we received the following "answers"

(Ans #1) y =

(Ans #2)

Would you accept the above answers (Ans #1 , Ans #2)

In the following question, one important consideration is the **"mirror" line**.

Where do you think the mirror lines going to be? How many mirror lines are there altogether.

Strategy: Sketch the graph on the paper and figure out.

This is one possibility: when the mirror line is the*y-*axis.

Can you tell the equation of the "reflection"?

This is one possibility: when the mirror line is the*x-*axis.

Can you tell the equation of the "reflection"?

Where do you think the mirror lines going to be? How many mirror lines are there altogether.

Strategy: Sketch the graph on the paper and figure out.

This is one possibility: when the mirror line is the

Can you tell the equation of the "reflection"?

This is one possibility: when the mirror line is the

Can you tell the equation of the "reflection"?

Some key points, discussed, when we sketch a graph, we should have the following **clearly indicated on the sketch**

*x-*intercept (i.e. when*y =*0)*y*-intercept (i.e. when*x =*0)- origin,
*O* *x*and*y*axis- equation of the line (i.e. we must remember to label the line)

Refer to the Activity Handout that we did in class.

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