measure of direction. 3 rules: always measured from north. always measured clockwise. always have 3 digits. when the angle is less than 100 one or two 0's are put in front so it has 3 figures
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HCF
HIGHEST COMMON FACTOR
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LCM
LOWEST COMMON FACTOR
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prime numbers
a number with only two factors, one and itself
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simplifying
collecting like terms
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parallel lines
if lines are parallel, they have the same gradient
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a random sample
where everyone in the population has equal chance of being in sample
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stratified sample
number sampled from each catagory is in proportion to number n that catagory
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Prism
a 3d shape with a consisitant cross-section. if cut at any point it'll be the same shape
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polyhedra
3d shape with flat faces and straight edges (some prisms are them)
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