Recharging...back in the 2010!!

Hello everyone,

It has been a crazy last few weeks. We have had a lot going on, and a lot of computer problems at school as of late, so we have taken a brief hiatus from the blog.

Not to worry though. We will be up and running once again in the New Year with lots of great improvements...

- SmartBoard Lessons attached
- more scribes
- more videos
- possibly a Math chat room
- and much more.

For now, check out our latest widget...on the left side...a live traffic widget that tracks where visitors to our blog are viewing from. If you'd like to add this widget to your blog, simply go to the Feedjit website and away you go!

Anyhow, for now, that's it. Have a happy holiday season, and Merry Christmas!

Correction$ and Reminder!!!_

We corrected our homework witch was 4-5-9 and 10 on page 128.

We used mytextbook.ca witch is an online textbook, you can use this website if you forget your textbook at school.

we talked about percents over 100% and less than 1%. we also talked about examples in life were theses percents are used in.

Near the end of the class we had to do a practice test on representing percents and it was for homework for the next day. the very last thing to do was to make sure that our math test was signed by our parent or guardian and returned

correction$ and reminder!!!_

this class we corrected our homework witch was 4-5-9 and 10 on page 128. we used my text book.ca witch is an online text book on the Internet. we talked about %'s (percents) over 100% and less than 1% that could be found in every day life. near the end of class we had to do a practice worksheet on representing percents, and it was for homework for the next day. the very last thing we did was to make sure that we had our math test signed by our parent or guardian and returned.,.,.,

Representing percents

Today in math class we had three goals but we only got 2 done.

1. Start Chapter 4 Representing Precents.

We learned how to represent percents more than 100%.

We also learned how to represent percents less than 1 ex. 1/2%

2. We corrected the math test! The class average was 75%. Which I think is pretty good.

People had the most trouble with number 22, 23, 24, and 25

Question

Hey O was up um i have a question :(

How do you find if it's a right triangle

My Foggiest Moment

The thing I was having trouble with was finding the whole number in between a certain square root. I now understand it though. Ex. finding the whole number in between the square roots of 8 and 9. The numbers would be 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, and 80.

Test Friday!!

Troubles

the thing i was have trouble with was questions like, find the whole numbers with a square root between, lets say, 5 and 6.. i just was reading the question wrong.. but i get it now it would be 26,27,28,29,30,31,32,33,34,35

Need help

I don't understand our to use prime factorization to get the square root

Thing I have trouble with

I don't understand how you get a square root using prime factorization.

My Foggiest Moment

My foggiest moment was number 11 on page 105. I understand it now. The thing I didn't understand was that I didn't know if I added my first square rooting into the equation or if I just left it out. But I just did it off to the side. Then I did my work slowly and carefully and I think I got it right!

Finding The Hypotenuse and the Leg of a Triangle

Todays Math was crazy! Mr.Oldcorn ripped out everyones homework and recycled it because it was wrong! We did the questions all over again! The reason why people aren't getting things is because they think 12 squared is 12X2, well it's not. 12 squared is 12X12. After Mr.O explained, the class was starting to understand. There are three ways to find the leg of the triangle. I'll show the way I like it. Oh ya 2=squared
A2 + B2 = C2
72 + B2 = 252
49 + B2 = 625
-49 - 49
72 = 576
B = 24cm
Remember to do your homework. Do to end of page 110 #10.

Things I have the most trouble with

OK the things I am having the most trouble with in math is with the Pythagorean relationship like finding hypotenuse , and a bit with square roots :)

The thig I have the ost trouble with is the Pythegorean relation

things i have problems with....

the thing i have the most problems with is the Pythagorean relation

Need Some More Attention Too...

The blurriest thing to me is different situations where you would use the Pythagorean Theory and when you would measure with your ruler.

Hardest topic in math for me

I think the Pythagorean relationship has been the hardest so far in this unit. Ex. Find the length or area of the hypotenuse.

Warning! Estimating Square Roots Zone

• First of all, we read through page 95-97
• On page 95 we looked at the picture that looked a little like this:

To figure it out you must find the square roots of 36m² and 49². The square root of 36m² is 6 and the square root of 49m² is 7. The square root of the middle mat has to be somewhere in between 6 & 7.

• On page 96 we looked at example #1. Felicity wants to build a pool. The area is 7 m². So to figure it out you must find the higher and lower square roots. (2²= 4 and 3²= 9) and 7 is closer to 9 so it would be closer to 3 than 2.



• We then, after lots of discussion, did show you know on the botttom of page 96 after looking at the solution to example #1.



• If your having trouble; look here:

What's the square root of 23?

1. make a number line



2. find the higher square root and/or perfect square and the lower square root and/or perfect square



3. find halfway ( if you need to write all numbers between the perfect square and cross off 1 by 1)



4. and then make an reasonable estimate

• Then we looked at example #2 on page 97


• We discussed example #2 (Which was finding all possible numbers with a square root between 2 square roots)

HOMEWORK:

• Yesterday's homework SHOULD be done
• Page 1 on the Handout we got today!

DUE TOMORROW!!

Math Class Thursday!

Today in math class Mr. Oldcorn told us that he will start marking our posts next week. They will be out of 10 marks. MAKE SURE YOU HAVE ALL YOUR CORECTIONS DONE!



First thing we did was pracitice some quick race guestions as a class to refresh our memories.
Example:
Then We were told to find the perfect square.
Example:





Then we did work on page 99 numbers 4-9 and 14 well some of the othe sutudents worked with Mr. Oldcorn on the smart board. Remember page 99 is due monday.

The next scribe will be Brittany McIntosh congrads!

Review of 3.1, 3.2 and 3.3

If A=15 cm2, B=5 cm2, then C would have to be 20 cm2. You see, in order for the triangle to be a right triangle the legs (two sides which are not the hypotenuse... the hypotenuse is the side opposite the right angle) area in A and B must equal the area of C. The Pythagorean Relationship states that A2 + B2 = C2.


The Pythagorean Relationship can also be used in real life, it has to be used for the highways and on buildings. "The construction workers wouldn't go out to the highway with a little protractor to measure a ninety degree angle." Those words were straight from the lips of Mr. Oldcorn.


Many people got 13.C) wrong on the page we were correcting, it was...'If B is 25 cm2 and C is 90 cm2, What is A?' The thing people did wrong was that they added 25 and 90, HOWEVER, it said what is A! A isn't the hypotenuse therefore, you don't add you, subtract so... C-B=A = 90-25=65 cm2 So A was 65 cm2!


Another thing we went over is square root, for example, you know the square root of 36 is 6. But how do you figure it out? Well, there is three ways to do so 1. Prime Factorization 2. Guess and Check 3. Calculator But what if you had a number that doesn't have a whole number for the square root. Like 51. Question, How would you find the square root of 51 without a calculator. Well you couldn't easily do it with prime factorization. So you can guess and check. But to do so first you have to find the closest two numbers. 51 would be 7x7=49 and 8x8=64. Once you know that you need to figure out whats halfway between. Half between 49 and 64 is 56.5 and 51 is closer to 49 than 64 so it's closer to 7 too. Which would mean it'd be around 7.2 .


After that we had a class vote, we could either have a quiz on 3.1, 3.2 and 3.3 or wait until the end of the unit and have a big test. It turned out more people would rather have a halfway test then a big test. We assigned the quiz for Monday, however, the date might change. You should probably start hitting the books for Monday!

This is a diagram of a right triangle to show you which are the legs and the hypotenuse.