## Tuesday, November 17, 2009

### Introduction to rectangles, perimeters, area

What Do We Know About Rectangles ?

- All 4 sides are not equal
- But they can be equal which is a
square
- So a square is a
rectangle
- But a rectangle can't be a square or is not a square

(Because square sides are all the same and equal , at the mean time at a rectangle only the length and length are the same and the width and width are the same)
Perimeter
-Perimeter is the space around an object or a shape (going around)
How Do We Get The Perimeter ?

We follow simple steps to find the perimeter :
P= s+s+s+s

eg. A rectangle has the length of 4 and the width of 5. What is the perimeter?
P=4+5+4+5= 18

Area
-Area is the space that is inside a shape or an object
How Do We Get Area ?

We follow a simple step to find area :
A=l(x)w(x)h

eg. A rectangle has the length of 4 , width of 5 , and height of 8. What is the area?
A=4(x)5(x)8
=160

After a brief introduction to what we know, we did some work with what we then learned

#Tiles Is it a square or no ? Area
1 yes 1
2 no 2
3 no 3
4 yes 4

Then for homework we had to do the following :

Side length of square Area of square
1 1
2 4
3 9
4 16
5 25
6 36
7 49
Reminder : The way we find the answers are just like the times table. n by n (nxn)

Mr. H

Dear Jem. Some pictures would add life to a good scribe post. Thanks for scribing

Mr. H
This comment has been removed by the author.
abby 8-73

good job jem!! Nice explaination but like Mr. h said,, you can do better by adding life to it ( which is impossible when u look at it differently lol) like by adding picture and colors (:

good job again (:

Eric.P 8-73

Good job Jem you explained things very well.

Camille873

nice job jemmy, but you couldve made the words a little bit bigger.