Triangles

problem

Tri.'s

Age

7 to 11

Challenge level

How many triangles can you make on the 3 by 3 pegboard?
problem

Cutting Corners

Age

7 to 11

Challenge level

Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?
problem

Tessellating Triangles

Age

7 to 11

Challenge level

Can you make these equilateral triangles fit together to cover the paper without any gaps between them? Can you tessellate isosceles triangles?
problem

Cut and Make

Age

7 to 11

Challenge level

Cut a square of paper into three pieces as shown. Now,can you use the 3 pieces to make a large triangle, a parallelogram and the square again?
problem

Part the Polygons

Age

7 to 11

Challenge level

Draw three straight lines to separate these shapes into four groups - each group must contain one of each shape.
problem

Tri-Five

Age

7 to 11

Challenge level

Find all the different shapes that can be made by joining five equilateral triangles edge to edge.
problem

Putting Two and Two Together

Age

7 to 11

Challenge level

In how many ways can you fit two of these yellow triangles together? Can you predict the number of ways two blue triangles can be fitted together?
problem

Triangle Relations

Age

7 to 11

Challenge level

What do these two triangles have in common? How are they related?
problem

Three Triangles

Age

7 to 11

Challenge level

What do you notice when you put three triangles together?
problem

Possible Pairs

Age

7 to 11

Challenge level

In this game, you turn over two cards and try to draw a triangle which has both properties.