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14 Cards in this Set
- Front
- Back
- 3rd side (hint)
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LCM & HCF using primes? |
1) use factor trees to find primes 2) make a venn diagram for the 2 numbers 3) LCM = × all numbers in venn diagram 4) HCF = x numbers in middle Dont use the indices :) |
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Direct proportion? |
A= kb Plug values a & b in Find k, drop line etc Plug new values in and work out |
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Inverse proportion? |
A= k÷b |
Same sorta thing as direct |
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Pythagoras? |
A* + b* = c* |
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C= |
Hypotenuse!! |
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Pythag with c? |
To work out missing side: 1)Plot values into a*+b*=c* 2) square them 3) - a from both numbers 4) square root c for missing side |
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Quadratic formula? |
Keep +- the whole way, solve for 2 answers at the end |
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Scatter graphs? |
Positive, negative or weak correlation? Weak? Strong? |
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Significant figures? |
To 1.s.f? From 2nd number. |
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Similar shapes? |
SCALE FACTOR! = N Area? N* Volume? N^3 |
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Simultaneous equations? |
-make xs or ys the same - add two equations - plug values back into og equation to check |
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Standard form? |
Ax10^n Way to shorten big or small numbers |
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Surds? |
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Rationalising the denominator? |
× bottom and top by * root A × *root = A*root (surd) |
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