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IGCSE Math


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IGCSE Math


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Amanda Plachy


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sin

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IGCSE Math - Details

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Questions:

78 questions
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Formula:
Area of a circle
Formula:
Circumference of a circle
A = lw
Area of a rectangle
P = 2l + 2w or P = 2(l + w)
Perimeter of a rectangle
Formula:
Area of a triangle
A = bh
Area of a parallelogram
Formula:
Area of a trapezium
V = lwh
Volume of a cuboid
Formula:
Surface of a cylinder
Formula:
Volume of a cylinder
Formula
Volume of a pyramid
Formula:
Volume of a cone
Formula:
Surface area of a cone
Formula
Volume of a sphere
Formula:
Surface area of a sphere
Formula:
Gradient/slope
Formula:
Sum of interior angles
Formula:
Interior angle in a regular shape
360 degrees
Sum of exterior angles
Formulas
Distance/speed/time
Only what A and B have in common
A n B (read as A intersect B)
Everything in A AND everything in B
A U B (read as A union B)
Everything NOT in A
A' (read as A complement)
I = PRT
Simple Interest
Formula
Compound Interest
Formula:
Pythagoras theorem
Image
Alternate angles
Image
Corresponding angles
Image
Vertical angles
Always = 1
Sum of probability outcomes
Probability of A x probability of b
Probability of A and B happening
Probability of A + probability of B
Probability of A or B happening
Formula
Multiplying indices with the same base
Formula
Dividing indices with the same base
Formula
Multiplying indices together
Formula
Negative indices
Formula
Percent change
Mean
The average of a set of numbers add all the numbers and divide by how many numbers there are
Median
The number in the MIDDLE of a set of data (data must be in order from least to greatest!)
Mode
The number in a set of data that occurs the MOST
Range
The difference between the smallest and largest numbers in a set of data
Order of symmetry
How many times the picture looks the EXACT same as you rotate it around
Gradient/slope
Change in y divided by change in x the measure of how steep a line is
Y-intercept
Where the graph crosses the y-axis
Origin
The center of a coordinate plane (0,0)
Isosceles triangle
2 sides are equal and 2 angles are equal
Scalene triangle
All three sides and angles are different
Obtuse
90 < angle < 180
Acute
0 < angle < 90
Reflex angle
180 < angle < 360
What does "make x the subject" mean?
Change the equation so it's x =
Expand
Multiply what's outside the brackets with what's inside the brackets (distribute) or if it looks like (x + 2)(x + 3) then FOIL
FOIL: what does that mean?
Multiply the FIRST terms, then the OUTER terms, then the INNER terms, then the LAST terms
Factor/factorize
Take an expression and put it back into brackets, often looking for a highest common factor to "factor out"
Highest common factor
Find the largest factor two numbers have in common (factors are the numbers you multiply together to get the number)
Least common multiple
The smallest multiple two numbers have in common (multiples are the answers to a number's multiplication tables. example multiples of 5 are 5, 10, 15, 20, 25, etc.)
Prime factorization
The prime numbers that you can multiply to get a number, use a factor tree
Rotation
Turn (list angle of rotation, clockwise or counterclockwise, and the center of rotation)
Translation
Slide (list the vector x on top and y on bottom)
Reflection
Flip (list equation of mirror line y = or x =)
Enlargement
Make bigger or smaller (list scale factor-compare the side lengths, and find center of enlargement-drawing lines from each point)
The letters x and y are going to be in your expression
Write an expression in terms of x and y means..
What does solve simultaneous equations mean?
You need to find the x value and the y value that make BOTH equations true! Usually use elimination method.
Nth term
A rule for a sequence involving the letter n
Line of best fit
A line drawn with an equal number of points above and below it