Blog Post for February 26, 2010

Sunday, February 28, 2010

Today in Math we watched a video about Scale factor, Similarity, and Proportions. Here is the link for the video: Scale factor, Similarity, and Proportions are related concepts2

Now I will try to explain what I learned from the video, because its kinda hard to understand. As said in the video: Similar Figures have corresponding angles that are congruent and their corresponding sides are proportional. Corresponding means that the angles are matching and congruent means equal.

This polygons are equal, but how do you know if it is equal. First you need to get the scale factor of the polygons.



The first one is dividing the scale factors from the sides of the two polygons. If the answer is the same it means that the sides are equal.



The second way is multiplying the scale factors. You can multiply the scale factors any way you want, the answer would always be the same.

My post today is short, but I will try to update whenever I can. The next scribe is MARK ABAYA.

Scribe Post for February 8, 2010

Monday, February 8, 2010

Heeeello guys! (:
Okay so, today we began our math class by making corrections to our chapter 3 test. After that, Mr. Backé handed out worksheets to us about scales and scale factors, Mr. Backé also handed out worksheets for chapter 4. Mr. Backé told us to copy out the definition for scale and scale factor out of our textbook.

Scale: A comparison between the actual size of an object and the size of it's image. This can be expressed as a ratio, as a fraction, as a percent, in words, or in a diagram. For example, a scale of 1cm: 50km on a map means that 1cm on the map represents 50km.

Scale Factor: The constant factor by which all dimensions of an object are enlarged or reduced in a scale drawing.

*REMINDER:
On Tuesday, February 16 Mr. Backé will be collecting the following in a "stash it":
1) Math Link Introduction
2) Math Link 3.1
3) Math Link 3.3
4) Math Link 3.4
5) Math Link Wrap It Up
6) Chapter 3 Self Assessment
7) Tests Signed By Parents
8) Journal
* All pages should be completed for 20% of this units mark.

I pick Breann as the next scribe.
Sorry if this scribe is short, I tried. (: