Know the ratio of circumference to diameter of any circle is always the same.
Circumference divided by diameter is pi, 3.14
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Circle Formulas
c = π d
c = 2 π r
d = 2r
A = π r²
Are is the measure of space, a two dimensional shape covers
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Sectors of circle graphs are made from central angles.
If the sector covers 25% of the graph the central angle is 25% of 360° which is 90° (0.25 x 360)
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Integers
negative numbers represent values below zero and positive numbers represent values above zero.
eg. above and below ground or sea level
1+ (-2) = (-1) is an addition statement
3 - (-1) = 4 is an subtraction statement
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Opposite integers have the same numeral but a different sign e.g 3 and (-3)
Know what a
(+) + (+) =
(-) + (-) =
(+) + (-) =
(-) + (+) =
(+) - (+) =
(-) - (-) =
(+) - (-) =
(-) - (+) =
Practice with different numerals in each situation
2 comments:
hey danilyn! i liked your post, because it reminded me of today in class. i think you should add a video or a link to one of the topics. here is a video for area of a circle! http://www.youtube.com/watch?v=V6ZABPVT7Ys
H Danilyn, great scribe post! Your post was really easy to understand and really read. I liked that you explained what was happening in your picture. It helped me a lot. But, you should use different colors for you font to make it stand out more. And you forgot to answer the questions on the bottom. So here's the answers for the questions: +, -, + -, + -, + -, + -, +, -. I noticed that you don't have a link and a video so here's a link and a video I'd found:
http://ca.ixl.com/math/grade-7/absolute-value-and-opposite-integers
http://www.youtube.com/watch?v=RDw3Gq-heTw
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