## Quiz on Monday, 3 October 2011

Guys, prepare yourself for the quiz on Monday…..

Tests for Similar Triangles, Enlargement or Reduction.

Check the completed worksheet out in my class.

Have a nice weekend.

## Tests for Congruent Triangles – Video presentations – Quiz preparation

Click on the link below to see the video explanation about Test for Congruent Triangles:

1. SSS – Side Side Side

2. SAS – Side Angle Side

3. AAS / SAA / ASA – Angle Angle Side

4. RHS – Right-angled Hypotenuse Side

Why ASS / SSA can not be written as the test for congruent triangles?

Quiz preparation, problem solving taken from Text Book ex. 12.03

## Summary from Monday, 15 Aug 2011

Guys, power point presentation, presented by Mr. Yulian is available in mathematics.hedy.me. But, before that, to remind you about the lesson today, please answer this following questions by replying as the comment. Who want to be the first 10 students reply for the following questions below?

1. Mention one characteristics of two parallel lines. hint: related to their gradients.

2. Mention one characteristics of two perpendicular lines. hint: related to their gradients.

3. $\frac{3}{2}&space;and&space;-\frac{2}{3}$ is called a pair of ……………… hint: when you multiply both numbers together, the result is -1.

4. Negative reciprocal of $\frac{5}{4}$ is…………….

5. Why $2x+y=5$ and $y=-2x+2$ are said parallel? hint: make y the subject (ubahlah menjadi y = ) for the first equation and refer to question number 1.

6. Do the lines $x+3y=3$ and $3y=9x+5$ perpendicular? Give reason! hint: make y the subject (ubahlah menjadi y = ) for the second equation and refer to question number 2.

Check for the second online homework that will be opened by tomorrow.

## Geogebra – Coordinate Geometry – straight line equations

** To explore about the distance of a line segment (length of an interval between two points), click on the link below:

*** Change the position of the points A and B, make the right-angled triangle then find the distance

distance

** To explore the gradient on a line, click on the link below:

*** Change the position of the points A and B, make the right-angled triangle then find the gradient. Also, look at the equation of the line, it follows $y=mx+b$, while m is the gradient and b is the y intercept