Monday, April 5, 2010

Create Circle Graphs

1. Construct(make, build) a circle
Use a string, compass or trace a circle.
2. Create the Central Angles
- central angle- is an angle formed by 2 radii
- the vertex of the angle is at the centre of the circle

25% like strawberry
25% like vanilla
50% like chocolate

Make a graph for the following info. 3 kids use the computer 1-3 days per week.
9 kids use the computer 0 days per week. 18 kids use the computer 4 or more days per week.

Step 1. Find out how many in total.
3+9+18= 30

Step 2. Convert to %
3 = 1 = 10 10% 1-3 days
30 10 100

9 = 3 = 30 30% 0 days
30 10 100

18 = 6 = 60 60% 4 or more days
30 10 100

50 | 180
25 | 90
10 | 36

Convert % to degrees.
10% of 360= 36 degrees
use a protractor to measure the central angle

30% of 360= 108 degrees
60% of 360= 216 degrees

Pages 296-297
Questions 4-13


  1. Great Post Errol ! You explained evergything really well. The things you should of put on it is a link and you should change some of you font to different colours for attention. Anyways Excellent Job ! (:

  2. Great post Errol! Everything was clear and made sense. I like how you made some of the important things a bright colour so they stood out. In your circle graph that showed the different flavours you forgot to put the "degrees" marks after the numbers. My only suggestions are that you should have put a link and more colours and fonts like Glenn said. Good Job!C:

  3. Great job Errol! Nice pictures, but next time you should add more colours too them. Also use different colours in the font. It was really good that you included all the notes and the homework. Your post could be inproved by adding a link or video, or maybe even both. Other than that, good job. (:

  4. Nice post Errol! You included everything you were supposed to. You're post didn't really grab my attention. Try to put more colours next time. Other than that. Good job :)

  5. Good post Errol. Your post was easy to read and easy to understand. The homework reminder was also big and easy to read. However, you should put a link and a video or link if you can find one.

  6. Good job Errol! Everything made sense and I like the way you put the picture so it would look like the notes we did. Good Job!

  7. good job errol , this is going to help me very much on the exam and easy to understand thank you !

  8. Great job Errol! Your post was easy to understand and I liked the pictures and colours you used, I also liked how you put the homework for us. Overall, good post:)

  9. Great post, Errol! It was clear, easy to understand, and well explained. You included everything you should have. I liked your pictures. You could have put a link or video or added some more color, but other than that, great job!

  10. Good Post, Errol! It was very clear to me and I can easily understand what you are trying to explain. You had all given notes on here, the pictures were pretty nice. You could have a video though. Anyways, you had a very good post. Keep it up ! (:

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  12. Great job, Errol! I really thought you had nice pictures, but next time you should add more colour to your post. You did a really good job including all the notes and the homework. Your post could be improved by adding a link and video. Other than that, I thought you did a really good job!

  13. good job the pictures were good and I liked how you changed some of the words' colours XD. You explained everything nicely but I would like to see a little more colours in this post. anyways good job :)

  14. Good job Errol but you could of made the pics brighter but they are big.

  15. good job errol you did a awesome job for the picture and i liked when you put big letters for are homework. next time you should put more colours but still good job

  16. Good job errol i really liked it you did an awsome job but next time maby u could add a little bit more colour and a vedio or something but i really like it other wise

  17. Good post Errol:D I like how you included pictures in your post and you included situations that related to the topic. Next time you should add more colour and maybe a link.