# maths revision cards

?
• Created by: emma55
• Created on: 22-06-15 18:19
what is the formula for pie ?
1 of 13
what do angles on a straight line add up to ?
180
2 of 13
what is a multiple ?
a number that is in the times table e.g 7,14,21,
3 of 13
what is a factor ?
a number that goes into another number
4 of 13
how do you measure the circumference ?
times the radius by the diameter
5 of 13
how do you measure the area ?
times circumference by pi ( 3.14 )
6 of 13
formula for the area of the circle ?
pie (3.14) r2
7 of 13
how to find a fraction of an amount ?
divide the amount by the denominator and multiply the answer by the numerator
8 of 13
what is ratio ?
the amount of on thing against another e.g 1 boy to 2 girls 1:2
9 of 13
how to find 5 % of something ?
find 10 % then half it
10 of 13
how to find 10 %
either take off a 0 or move one decimal place or divide it by ten
11 of 13
how to find 90 %
find 10 % then multiply by 9
12 of 13
how to find how many degrees goes in to a slice of pie chart
find the frequency divide it by the overall frequency times answer by 360
13 of 13

## Other cards in this set

### Card 2

#### Front

what do angles on a straight line add up to ?

180

### Card 3

#### Front

what is a multiple ?

### Card 4

#### Front

what is a factor ?

### Card 5

#### Front

how do you measure the circumference ?