## Tuesday, November 9, 2010

### Jae Anne's Estimating Square Roots

Estimating Square Roots

pg. 99 # 12 & 13

12. While stopping online, Ji Hun finds a square rug with an area of 11 m² . He needs to know if it will fit in his 4 m x 5 m bedroom.

a) Estimate the side length of the rug, to one decimal place.
√9          √11          √16
3           3.2             4

b) Check your estimate with a calculator.
√11 m² = 3.3

c) Will the rug fit? Explain.
Yes the rug will fit since its side length is smaller than the shorter side of the room.

13. Stella is planning an outdoor wedding. She would like a square dance floor with an area of 115 m².

a) Determine the side length of the dance floor to the nearest tenth of metre.
√115 m² = 10.7

b) What are the two side lengths the dance floor can have that are closest to to what she wants?
10 m or 11m

c) What are the two areas for the dance floor that Stella can choose from?
100 m² or 121 m²

d) Which area will Stella choose? Explain.
She will choose the 121m dance floor since it is much closer to her desired size.

1. Good job, Jaeanne! Next time add a picture or video to improve your post, but overall it was a great post!

2. Great post Jae Anne. Great use of color and it looks very organized. Next time add a video, link, or picture to make your post better. Other than that, great job.

3. Good Job Jaeanne! Nice colors, next time add picture.

4. Good job, Jaeanne! I really liked all the colours and thanks for putting the answers and the questions on the post.

5. Great post Jaeanne, I liked that you only put colors on the question to make it specific. I also liked how you explained the answer well but next time you make it you should add a video, picture and a link.