Theorems

Don't forget to use the pro-forma (template) layout when proving theorems).

A diagram, labelled followed by
Given:
To prove:
Construction:
Proof:
... and the last line of your Proof: should be the same as your To prove: line.

Look over the first 2 theorems on page 401 and practice writing these out.
Look over the theorem we did today - I will give you a simplified version of it which is from the marking scheme (2004) in class tomorrow.

Then practice your constructions from the Ordinary level course (you'll find more detail on them in book 1).
You should be able to draw parallel lines, bisect an angle, construct the perpendicular bisector of a line and divide a line into 3 or more equal parts.
These constructions take some practice, so it is worthwhile spending time.
Remember that the construction lines aren't supposed to be hidden - so make sure that any arcs or other marks you make on the page are visible.

Don't forget your geometry sets for Tuesday!!
You need at least a compass and ruler, preferably a set square also.