Below is an interactive version of the diagram. Drag the points to see how the diagram responds.
Main Angle Theorems page.
When you think that the angle theorems are understood head for an Angle Activity.


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Recently UpdatedRatioA self marking exercise on using ratio notation, reducing a ratio to its simplest form and dividing a given quantity into a number of parts in proportion to a given ratio. So far this activity has been accessed 59602 times and 22931 Transum Trophies have been awarded for completing it. 
