Cheatography
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I’m just trying to pass with a high grade in my exams.
REMEMBER TO ROUND THE DECIMALS!!!
E.g. 1.27969 would round to 1.28 |
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Similarity and Congruence
Terms |
Congruent Shapes |
Similar shapes that have been moved in some way |
Rotation |
The shape has been turned over |
Reflection |
The shape has been flipped over as if it was reflected in a mirror |
Translation |
The shape keeps its same orientation, but it has been simply moved |
Radicals and Pythagoras
Pythagoras Theorem: |
a2 + b2 = c2 |
Statistics
Types of Data |
Categorical |
A collection of information that is divided into groups. |
Numerical |
Data in the form of numbers. |
Terms |
Range |
Biggest number - smallest number |
Terms |
Sum of all values divided by the number of values. |
Median |
The middle number of a numerical data set. If there are 2 medians use this formula: (a+b) / 2 |
Mean |
Sum of all values divided by the number of values. |
Mode |
The number with the highest frequency (most occurring). |
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Similarity and Congruence
Coordinate Geometry
Distance Formula: |
d = √(x2 - x1)2 + (y2 - y1)2
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Midpoint Formula: |
((x1 + x2) / 2 , (y1 + y2)/ 2) |
Gradient Formula: |
y2 - y1 / x2 - x1 |
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Formulae
a = 10, b = 5, c = 15 |
Find d if d = ab + c |
d = 10 x 5 + 15 = 65 |
Trigonometry
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Sine O/H |
θ = Delta |
Cosine A/H |
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Tangent O/A |
When finding θ (Delta) you use Sin-1, Cos-1 and Tan-1. When you type it into the calculator press shift.
Graphing Lines From Equations
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