Lily's Formula's Flashcards
linear nth term=?
A sequence is linear if the first difference is constant
Quadratic nth term=?
A sequence is quadratic if the second difference is constant
Area of a triangle=?
base x vertical height divided by 2
Area of rectangle=?
length x width
Area of a circle=?
pi x radius squared
Percentage to Decimal
divide by 100
Decimal to percentage
x 100
Fraction to Decimal
divide the numerator by the denominator
Increasing the number by a percentage
x the number by-the percentage divided by 100
then add the original number with the new percentage
how to find the mean
add up the numbers and divide by how many numbers there are in the sequence
how to find the median
the middle number is the median (order numbers first)
how to find the range
the biggest number subtract the smallest number
qualitative
words eg what’s your favourite food?
quantitative
numbers eg how many siblings do you have?
acute angles
under 90 degrees
obtuse angles
over 90 degrees
under 180 degrees
reflex angles
over 180 degrees
right angles
90 degrees
pie charts are out of
360 degrees
scatter graphs are used for
to compare two categories
square roots
it is a number which when multiplied by itself produces the given number
a cube root
it is a number which when multiplied by itself three times produces the given nuber
