Similar shapes are exactly the same shape...but can be different sizes. This means all their angles must be the same and their sides proportional to each other....

Congruent shapes are the same in size and shape....however they might be rotated or reflected.
Proving Triangles Are CongruentIf asked to prove triangles are...

TranslationsWith a translation you just move all the points that make up a shape. Usually a translation is written like this:
All you do is move each point x...

There are more rules about a circle than you would expect. Learn them all though and you'll be able to outfox the examiner.
A Tangent And A Radius Meet At 90...

If you can learn the following rules then you're life is going to a lot easier....well....at least during your maths exam.
Angles In A Triangle Add Up To 180...

Parallel lines are always the same distance apart ("equidistant") and will never meet. Examiners love to throw in a question or two about them.
Angles Around...

A polygon is just a "many sided shape". A regular polygon is one where all the angles and sides are the same (if they are different you have an irregular polygo...

There are a few type of symmetry your might need to know about.
Line SymmetryThis is really easy. You just draw a dotted line along where a shape will fold e...