## Friday, December 10, 2010

### Kathleen's Scribepost for December 10, 2010

Today in math : Classifying Triangles

`HOMEWORK `
`4.3 Extra Practice Textbook ; Practice and Apply ODD OR EVEN, Extend 18 and 20. Oh, sorry for all the pictures and not much words. Just got lazy with paint. SORRY! `
`AND I PICK PAULO FOR THE NEXT SCRIBER. HAVE FUN. `

## Thursday, December 9, 2010

### Raquel's Scribepost for December 9th

Today in math class, we learned about Similar Triangles.
We learned terms like congruent. Congruent has a symbol that looks like:

Congruent means, Identical in shape and size.

We also learned the term similar. Similar al
so has a sign which looks like:
Triangles are similar if:
• Two pairs of corresponding angles are congruent
• Three pairs of corresponding sides are proportional
- Each vertex is a upper case letter and the opposite is a lower case letter.

A formula that you can use is:

OR

Example:

That`s pretty much it for what we did in math class. Tell me if I forgot anything and please leave a comment if you actually go on here and read it and if you can`t see the picture just click on it.
- Raquel. :)

BTW......
HOOOOOMEWORK
-go to www.spmathgr9.blogspot.com
-apply and practise. Odd or even.

NOOOOOW, I`m done and sorry I know i posted it up late. :S

## Monday, December 6, 2010

### John's Scribepost for December 5th,2010

Sup guys today in class we talked about scale and scale factors.

Scale : Proportional Reasoning

Image : Actual

Then we did a problem is was:

A B A
prime Bprime
1 : 7 X : 23.5

But before starting with the question Mr.Backe
explained something about where the primes should go and where they shouldn't go.

Works: A/A
prime = B/Bprime

Doesn't Work: A/Aprime = Bprime/A

Then we started on the question

1 : 7 x : 23.5

1/x = 7/23.5 so you would cross multiply the numbers so 7 multiply x equals 7x
so you would put it like this.

7x/7 = 23.5/7 then 7x/7 would cancel each other out so you would divide 23.5 by 7 and your answer will be
3.36
X=
3.36

After we were done talking about that question we did another

2 : 3 11 : x

2/3 = 11/x so as the last question went you would multiply 2 by x which would equal 2x and 3 by 11 which would equal 33. So the format would be like this

2x/2 = 33/2

2x/2 would cancel each other out and you have to divide 33 by 2 to get your answer of
16.5.
X=16.5
Mr.Backe said it was called By Inspection.

After finishing more questions we reviewed the

mm cm dm dam hm km
mi ci di 1000 deca heca kilo
1000000 10000 m 100 10 1
100000 l
g

Then Mr.Backe asked how many 1cm would you need to reach 10km and the answer was you would need 100000 1cm to get the 10km.

Then Class Ended.

Homework: