maths revision cards 3.0 / 5 Mathematicsrevision OtherNone Created by: emma55Created on: 22-06-15 18:19 what is the formula for pie ? 3.14 (circumference,diameter,radius) 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

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