-Sectors of circle graphs are made from central angles
-If the sector covers 25% of the graph, the central angle is 25% of 360 (degrees) . Which is 90 (degrees).
711-2011
Thursday, June 14, 2012
Circle Formulas
c = (pi) d
c = 2 (pi) r
d = 2r
A = (pi) r2
Area is the measure of space a 2D shape covers.
Divisibility Rules
0 = ends in zero
1 = all numbers
2 = even numbers
3 = sum of the digits is 3
4 = divisible by 2 twice
5 = ends in a 0 or 5
6 = divisible by 2 and 3
8 = divisible by 2 thrice
9 = sum of the digits is 9
10 = ends in 0
1 = all numbers
2 = even numbers
3 = sum of the digits is 3
4 = divisible by 2 twice
5 = ends in a 0 or 5
6 = divisible by 2 and 3
8 = divisible by 2 thrice
9 = sum of the digits is 9
10 = ends in 0
Integers
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
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
Intergers
Opposite integers have the same numeral
but different sing eg. 3 and (-3)
know what a (+) + (+) = (+) - (+) =
(-) + (-) = (-) - (-) =
(+) + (-) = (+) - (-) =
(-) + (+) = (-) - (+) =
but different sing eg. 3 and (-3)
know what a (+) + (+) = (+) - (+) =
(-) + (-) = (-) - (-) =
(+) + (-) = (+) - (-) =
(-) + (+) = (-) - (+) =
Divisibility
Definition:
Divisible- Means when a number can be divided by another number, with no remainder or decimal.
(It's a whole number.)
Divisible- Means when a number can be divided by another number, with no remainder or decimal.
(It's a whole number.)
Probability
DEFINITIONS:
Experimental probability: Actually doing the trails
Theoretical probability: what you expect to happen
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