300 kids were asked what was their favourite color ( shown on circle graph )
1. How many like green
2. How many like blue ?
3. How many like gold ?
Answers :
90 like green
75 like blue
135 like gold
* can also be shown through a ratio table .
What is the estimated ratio of circumference to diameter ?
3.14 : 1
Find the circumference when the radius is 6 cm .
* 2r = d
6 x 2 = d
12 = d
* c = 2 pi r ( sorry, i couldnt find the pi symbol on my laptop )
12 x 3.14
circumference = 37.68 cm
* MEMORIZE THESE FORMULAS *
d = 2r
c = pi d
Find the area when the diameter is 10 meters
A = 3.14 x 5 (5)A = 3.14 x 25
A= 78.5 meter sq.
The measure of a sector is 20 % of the data. What is the central angle of this sector
20 % of 360 dergrees.
0.2 x 360 = 72 degrees.
* remember all circles are made up of 360 degrees.
the central angle is 198 what percent of the circle does that represent
55 %
I have a pool with a radius of 6m.
My yard is 30m by 15m.
How much space do I have left in my yard
To get the area of the yard you multiply 30 and 15 which = 450
To get the pool you use area you use A= 2 pi r which = 113.04 m
To get the answer you subtract 113.04 from 450 which = 336.96 m squared.
Your yard is 100 feet by 40 feet. You aced a 3 foot sidewalk around your pool. If your pool is a circle, what is the biggest area your pool can be .
40 - 6 = 34 feet.
Ao = pi r squared.
Ao = 3.14 x 17 squared
A0 = 3.14 x 289
A0 = 907.46 ft squared
If you need more help heres a couple of websites :http://www.mathsisfun.com/area.html
http://www.worsleyschool.net/science/files/circle/area.html
http://en.wikipedia.org/wiki/Circular_sector
Thanks for reading my blog ! Make sure you comment and give me tips on how to improve blogging.
remember tomorrow is the last day they are selling the Athletic Banquet tickets ! Get them @ Room 2 for $ 5 dollars.
START STUDYING FOR EXAMS ! Our math exam is this coming friday ):
GOOD JOB DIORELLA! Nice colours. However you could've make the fonts bigger. Anyways, KEEP IT UP!
ReplyDeleteThis comment has been removed by the author.
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ReplyDeleteGreat Job Diorella, next time try making the fonts bigger other than that, well done. (:
ReplyDeleteGood job Diorella! Keep it up!
ReplyDeleteGood Job Dioreela!, next time try using bigger fonts, other than that,Good Work!
ReplyDeleteI like the colours!
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ReplyDeleteNext time you should not use Wikipedia because it is not a reliable source for information.
ReplyDeleteGood job diorella! i like the colors , try to add a video next time
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ReplyDeleteDiorella i liked the colors you used but next time make the font bigger, great job.
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ReplyDeleteGood job Diorella, keep it up!
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ReplyDeleteGood job, i like how you made your own pictures. and next time i think you shouldnt use yellow, so we can read it better.
ReplyDeleteGood job diorella, I like the colors. Keep it up!
ReplyDeleteGood Job Diorella, next time try making the fonts bigger other than that.
ReplyDeleteKeep it up..
Good Job!Keep it up
ReplyDeleteGood job Diorella!!! Next try making your fonts bigger
ReplyDeleteu had a lot of awsome pictures but it seems that the smiley face didn't fit there because math exam means end of school :D
ReplyDeletegoo job. nice colors and pictures but next time you should try adding a video.
ReplyDeleteDiorella, your post is very nice. I like the photos you added but next time try to add a video and a link. You should also change you're font because it is very small and hard to read (;
ReplyDelete