So, what's with the biscuits? Oh a triangulator machine! Very cool! Right, there are four different types of triangle. First, here's an isosceles triangle, it has two equal length sides and two ...

So, what's with the biscuits? Oh a triangulator machine! Very cool! Right, there are four different types of triangle. First, here's an isosceles triangle, it has two equal length sides and two ...

4. Now have a student explore trying to overlap the blue triangle onto first the red triangle and then the pink triangle. (Have several students explore this - they need to be convinced that the blue ...