## Tuesday, January 10, 2012

### Jairus scribepost textbook

#6 A rectangle has an area of 64m square.

a) Determine the prime factorization of 64

b) Is 64 perfect explain?

Yes, because if you use the basket you get 2 sets of 2 per basket.

c) Draw a square with that area and label its side length.

#11 what is the square of each ot
her?

a) 9- the area of the square is 81

A= lw
A= 9x9
A=81 square

b) 11-area of the square is 121

A=11x11
A=lw
A=121 square

#12 determine the square for each number?

a) 3- the area
A=lw
A=3x3

A=9 square

b) 18- the area
A=lw

A=18x18
A=164 square

15. Evaluate

c)root 625
25x25=625

#16. Determine the value?

c) root 1600

40
40x40=1600

#19. The gym teacher told
to run twice around the prerimeter
of the school gym. The area
of the square field is 28 900 m square. What is the distance they ran?

1156m
28 900x4=1156m

#22. The world's largest city squ
are is Tiananmen Square in Beijing, China. It has an area of 396 900m 2.

a) what are the dimen
sion of the square?

630m by 630m

b) If the the square had dimension of 629m by 629, what would be the area?
A=lw
A=629x629
A=395 641m

c) If the square had an area
less than 394 000m2 and then greater than 386 ooom2 what are all the possible whole dimensions that it
could have?

622m by 622, 623m by

623, 624m by 624, 625m by 625, 626m by 626, 627m by 627

Part two
#1. a2 + b2 = c2
This is saying that the two small legs a and b
equals to c the hypothnuse the longest leg of the triangle.

#2. Solve the the problem

to find the missing side length do this steps:

1. use formula (a2 + b2 = c2)
2. change letters to numbers
3. square the number (ex. 32 - 3x3)
5. find the square root of the total

#3. Is it a right triangle

to fin if its not a right triangle do this steps:

1. use formula
2. change letters to numbers
3. square the numbers
5. ad it again to make sure it correct

2. Good job Jairus. I like that you made your pictures than finding pictures on Google and your post helped a bit and so did the video but maybe next time you should add colour and what did you mean by lw?

4. Good Job Jairus. I like how you explain your answers and change size. The video helped me in some ways. I also like how you put a video about finding the square of phytagorean theorem. But please check your answers for number 6. Like Norien and Tinille said, For 6 a), 8x8 is right, and 4x2 is right also, but in the end, you mixed up. The prime factorization of 64 is suppoed to be 2x2x2x2x2x2. Maybe because you forgot to bring down the 2s. Because of that, it effects the answer for number 6 c), 2x2 is 4 and 4x4 is 16, not 64. You could've put 2x2x2, which is equal to 8, then 8x8 is equal to 64. For 12 b), how did you get 164? Isn't it 324? Because 18x18 = 324. Overall nice job!

6. This comment has been removed by the author.

7. Great job, Jairus! I think you forgot another set of 2's in the first question (6,b). So it would be 2x2x2. For question 19) I got a different answer but I don't think mine was right and I think the answer is suppose to be bigger then the first number. I wish you added more colour but it's okay. For question 12b), isn't it 324? Since 18 x 18 is 324. Well this was still a great scribe post!

9. Good Job, Jairus! I liked how you created pictures to provide us more information although you could have used the font manager and other tools on paint instead of writing the numbers out by using the mouse.
#6- You missed out on one 2. Because, 2x2(side length) is only 4 and 4x4 does not give 64 it gives you 16. but 2x2x2=8 and 8x8=64
I also noticed that you missed out on the multiplication part for the length and width (first step). You put in lw instead of l x w, it sure would help if blogger could have handwriting fonts, don't you think?
#12b)- 18x18 is not 164, it is 324.
(18x20= 360
(18x2= 36
(20-2= 18
(360-36=324
For number 15 and 16, was it alright for you to just pick one example? Sorry. I was just wondering.
#19-
√28900= 170
170x170= 28900
170= ONE side length. perimeter= FOUR side lengths.
170x4=680. Since it also said that they ran twice around the perimeter of the school gym you multiply that by two.