## Monday, March 22, 2010

### Area

Area - The space a shape takes up.
- Describe in square units 4cm2.

Review
Area of square or rectangle.

eg.

A = L x W
A = 6 x 2
A = 12cm2

Parallelogram:

eg.

A = bxh
A = 10 x 5
A = 50cm2

Finding Area of a circle.
Use pieces of circle to create to
a shape very close to a parallelogram.

Close to parallelogram.
h = radius of a circle
b = 1/2 circumference
Ap = b x h
Ao = 2 pi r/2 x r
Ao = pi x r x r
Ao = pi r 2

Find the area of a circle with a radius of 10m. Formula and work.
Ao = pi r 2
Ao = 3.14 x 10 2
Ao = 3.14 x 100
Ao = 314 m2

Find Area of following circles.

Ao = pi r 2
Ao = 3.14 x 8 2
Ao = 3.14 x 64
Ao = 200.96cm 2

Ao = pi r 2
Ao = 3.14 x 14.5 2
Ao = 3.14 x 219.64
Ao = 687.79cm 2

r = d/2
r = 6.8/2
r = 3.4

Ao = pi r 2
Ao = 3.14 x 3.4 2
Ao = 3.14 x 11.56
Ao = 36.30m 2

r = d/2
r = 20/2

Ao = pi x 2
Ao = 3.14 x 10 2
Ao = 3.14 x 100
Ao = 314cm 2

Enjoy the video:

1. This comment has been removed by the author.

2. I'm sorry that I leave out some spaces. I tried to fix it but it would end up all messed up so i didn't want you guys to get confused. I'll try to do better next time. Please ignore the spaces, thank you!

3. Great post, Raelynn! The pictures really helped me and I liked how you changed the font color. Amazing scribe!

4. Good job Raelynn! I really liked how you used different colors for some of the words and it's really organized.

5. Nice post Raelynn! I like how you use alot of pictures to help us understand your scribe but you should use a little darker colour because it seems like the words are blending in with the backround.But it was still a good post.

6. Nice post Realynn! It was well organized and helped me understand it better.

7. Great post Raelynn. I really like how it is neat and organized. It's very easy to understand. I also like the pictures that you made. Some of the colours of the words were a little bit distracting though. Other than that, great post.

8. Nice post Raelynn!!! It was organized and well written. But next time it might be better to not use as much different colours.

9. nice post Raelynn. Your post is very organized and its very colorful but next time don't use too much colors cause it's kind of distracting other than that great job!!

10. Nice post Raelynn ! It was organized. I really like the colours you added !

11. Great post Raelynn, I like how you made all of the pictures yourself and the video really helped!

12. Great post Raelynn the pictures really helped and some of the important letters really helped and the video was also great.

13. Great Post Raelynn. It looks really organized and heat but the colors are a little distracting like Kim said. Other than that, great job.

14. Excellent post, Raelynn! I really liked how it was organized. Though there were too many colours and what Kim said, it was a little distracting. Overall, it was a well done scribe post.

15. Good job Raelynn. There were lots of different colours though.

16. Hello my name is Bryce. I am one of the students from Zagreb. You explained the lesson very well and I can understand what your class is doing. However I believe that you could have explained the math a little bit more.
Bryce comment 2

17. Hey, my name is Fabi. I think your blog post was great, because you included pictures and a video and plenty od explanantions. I also think it was very neat. At times your font was a little bit hard to read. Overall, though, super blog post

18. Great job Raelynn, your post was orginized and had a video, i think next time you should not use to many colors but other than that great job!

19. Great post. You remembered the link and video. Great job. I would be more attracted to the article if there was more colour, just a suggestion.

20. Nice post. I like the video and it help's alot. You could have put a link to a website though.

21. Great post Raelynn. I liked the colors you used. Next time you should put a video though. But overall nice work.

22. I really like your post good job

23. I like your post! Next time you should put a link on the video.

24. good post, next time u should add a video

25. Nice post Raelynn, it was very organized but try to add a video next time.

26. Nice post, Raelynne. I like the video you posted and I think your scribe is pretty neat, but you over did it with the color.

27. Nice post, but u could have added a link to a website.

28. Great post next time you should add more colour to it though!

29. Good post next time add more colour!