## Friday, October 29, 2010

### Scribe Post 4

Page 86 Questions 17 and 19 and 21

17. A fridge magnet has an area of 54 mm2. Is 54 a perfect square? Use prime factorization to find the answer.

54 is not a perfect square because the equation is not equal on both sides.

19. The gym teacher told the students to run twice around the perimeter of the school field. The area of the square field is 28 900 m2. What distance did the students run?

the square root of 28900 is 170
The students ran 170m.

21. Kate is going to put a patio in her backyard. The patio stones she is using each have an area of 1 m2. She has created th
e rectangular design shown.

a) What is the area of the patio?
A=l x w

A=14 x 4
A=56m2

b) What are the di
mensions of another rectangular patio she could build
with the same area?

56- 1, 2, 4, 7, 8, 14, 28, 56
-1 and 56
-2 and 28
-4 and 14
-7 and 8

c) Kate decides to make a patio with the same area but she wants it to be a square with whole number side lengths. Is this possible? Explain your reasoning.
No, it is not possible because 56 is not a square number, therefore it is not a perfect square.

#### 4 comments:

1. Nice post! It was very descriptive and next time you might want to considering adding a video or link.

2. Neat post Julibella, I liked that your post is so neat and has lots of information and answers from the question. I would prefer you put colors on the questions because it kind of confused me.

3. Great post JB. It looks very organized and neat. Next time add a video and a link to make it better. Also make it a little more colorful. Other than that, great job JB.

4. Very nice post, Julibella. I liked how it's neat and organized. The pictures were clear to see and understand too. Next time, it would be nice if you add a link, video and maybe give a little more color to your post. Overall, great job.