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GCSE maths foundation revision
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Gravity
Terms in this set (51)
Factors
Numbers that fit into another number exactly
Multiples
The times table for that number
Prime Numbers
2,3,5,7,11 a number with only 2 factors: 1 and itself
Triangle types: Equilateral
Equilateral: all sides the same length, all angles equal 60 degrees
Multiply fractions
Multiply the top numbers together
Multiply the bottom number together
Dividing fractions
KFC
Keep Flip Change
Adding and subtracting fractions
DO NOT add or subtract until the denominator (bottom number) is the same.
Use the scissors or the cherry
Mean
Add them all up
Divide this number by how many values you have
Mode
The most common number
Median
Order the numbers
Find the middle number
Triangle types: Isosceles
Two longer sides are equal length
Base angles are equal
Angles add up to 180 degrees
Pythagoras theorem
Find the missing length of a right angled triangle
Angles on a straight line
Add up to 180 degrees
Angles in quadrilateral (4 sided shape)
Add up to 360 degrees
Angles in parallel lines: Co interior
Co - interior angles - C shape in any direction
Add up to 180 degrees
Angles in parallel lines: Alternate
Alternate angles - z shape in any direction
Always equal
Angles in parallel lines: Corresponding
Corresponding - F shape in any direction
Always equal
Vertically opposite angles
Are equal
Fractions of an amount
Divide by the bottom 3/4 of 12 = 9
Times this answer by the top
Percentages of amounts:10%
To find 10% divide by 10 10% of 80 = 8
10% of 93 = 9.3
Percentage of amounts: 1%
To find 1% divide by 100 1% of 500 = 5
1% of 870 = 8.7
Square numbers
Times the number by itself
Learn up to 15 squared
Square root
The reverse of squaring a number
Cube numbers
Times the number by itself three times
Learn up to 5 cubed
Cube root
The reverse of cubing a number
Angles facts: Parallelogram
All add up to 360
Opposite angles are equal
Angle facts: Rhombus
All add up to 360
Opposite angles are equal
Area of a rectangle
Length multiplied by width
L x W
Area of a triangle
Base times height, divided by 2
Area of a parallelogram
Base times perpendicular height
Area of a circle
Perimeter
All around the edge of the shape
Add up the sides
Circumference/perimeter of a circle
Circle parts: Diameter
A line that goes from side to side while passing through the centre....now isn't that simple
Circle parts: radius
A radius from centre to rim
Circle parts: sector
Circle parts: Tangent
Looks like a tangerine on a table!?
Circle parts: segment
Factorise
This means put back into brackets
Find a common factor
Circle parts: arc
A little bit of the circumference
Translate
Move the shape: left or right
up or down (using a vector)
Reflect
This is a flipped image in a mirror line
Rotate
The image will have turned (rotated)
You will need a direction (clockwise/anticlockwise
How many degrees
About (the co-ordinate you place your pencil)
Enlargement
The shape will change size (usually bigger but sometimes smaller)
You will need a scale factor - multiply side lengths by the number to draw your new shape
Range
The biggest number take away the smallest number
Pentagon
A shape with five sides
Hexagon
A shape with six sides
Heptagon
A shape with seven sides
Octagon
A shape with eight sides
Nonagon
A shape with nine sides
Decagon
A shape with ten sides
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