This diagram shows 3 sets of parallel lines. What do you notice in the diagram?
Look at the triangle with angles marked 1, 2 and 3.
Call this T.
Label angles equal to these angles. Why are they equal?
Look at the larger heavily outlined triangle.
How many copies of triangle T can you see in this triangle?
What else do you notice about this triangle?
Click here for a copy of the diagram,
and here for a TESSELLATING TRIANGLES worksheet.
Click here for the TESSELLATING TRIANGLES Inclusion Guide
and here for Notes for Teachers.
Click here for a poster.
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