area of a trapezium
a+b/2 X HEIGHT
volume of a PRISM
AREA OF CROSS SECTION x NUMBER OF LAYERS (LENGTH)
WHAT IS THE CROSS SECTION OF A CYLINDER
the circle
volume of a cylinder
area of cross section x height
(Pi x r2)x height
area of parallelogram
length x width
equation of a line
y=mx+c
How to find out equation of line
1 FIND OUT GRADIENT BY y2-y1/x2-x1
THEN use substitute numbers into the formula y=mx+c to find out c
how to find out mean from frequency table
divide total fx by total frequency
how to find out median on a frequency table
add frequency together divide it by two see where that number lies, that is your median
how to find out mode from frequency table
number with highest frequency is the mode
how do you find range in frequency table
take away highest value and lowest value from the data set.
Ho would you find an angle in a triangle?
you would find out the sides in the question for example they may be Adjacent and opposite then substitute them into the equation tan-1(o/h)= the answer
how would you find the length of a side when using trigonometry
for example you need to find the opposite and the only other side in question is adjacent side you would:
tan(e.g 57) x adjacent = answerrr
what is 1km = to
1000m
what is 1m = to
100cm
what is 1m = to
1000mm
what is 1cm = to
10mm
are corresponding angles equal
yes
are opposite angles =
yes
are co-interior angles equal
NO they add up to 180
are alternate(Z shape) angles =
yes
how do you divide indicies
take them away from each other unless there are brackets around them
how do you multiply indicies
add them together unless brackets are involved
how to find the area of sector of circles when angles are involved e.g 51 degrees and 7 is radius
150/360xpi7squared= answer
= 64.1
