The quadratic formula
What is the quadratic formula? Despite being a useful skill, it does take quite a bit of time to factorise ...
The difference of two squares
What is the difference of two squares? When we have an equation which contains only two parts it is often ...
Constructing regular polygons
Different regular polygons can be made from circles by equally dividing them into the correct number of segments. To do ...
Fractional powers
Rules of fractional powers Instead of always having a whole number that is a power we may sometimes have one ...
Interquartile range and semi-interquartile range
Interquartile range The names of these two ranges do sound rather complicated but really they are quite straightforward and are ...
Median and quartiles
What is a median? The median is the middle number found when the list is ordered. Using a cumulative frequency ...
Scatter graphs
All about scatter graphs Scatter graphs are used to plot two different outcomes against each other. This allows us to ...
Line graphs
All about line graphs A line graph is a type of graph used mainly to show a difference of something ...
Tangent properties
A tangent is something which we have already looked at and involves a straight line which just touches a curve ...
Circle sectors
Finding the area of a circle sector To find the space taken up by a circle sector we just need ...
More trigonometry rules
We will now move away from using trigonometry only with right-angled triangles and instead look at how we can find ...
Types of samples
Selecting samples When we decide who to ask questions to in a survey there are several ways for us to ...
Pie charts
All about Pie Charts A pie chart is used to represent data that can be separated into segments. This means ...
Histograms
What is a Histogram? A histogram is basically a type of bar graph that will immediately tell us the spread of ...