Triangles

problem

Half a Triangle

Age

14 to 16

Challenge level

Construct a line parallel to one side of a triangle so that the triangle is divided into two equal areas.
problem

Seven Sticks

Age

5 to 7

Challenge level

Explore the triangles that can be made with seven sticks of the same length.
problem

Three Fingers and a Loop of String

Age

5 to 7

Challenge level

Using a loop of string stretched around three of your fingers, what different triangles can you make? Draw them and sort them into groups.
problem

Board Block

Age

5 to 7

Challenge level

Take it in turns to make a triangle on the pegboard. Can you block your opponent?
problem

Logic Block Collections

Age

5 to 7

Challenge level

What do you think is the same about these two Logic Blocks? What others do you think go with them in the set?
game

Board Block for Two

Age

5 to 7

Challenge level

Board Block game for two. Can you stop your partner from being able to make a shape on the board?
problem

Six to Four

Age

5 to 7

Challenge level

Move four sticks so there are exactly four triangles.
problem

Animated Triangles

Age

5 to 7

Challenge level

Watch this "Notes on a Triangle" film. Can you recreate parts of the film using cut-out triangles?
problem

Triangle Edges

Age

5 to 7

Challenge level

How many triangles can you make using sticks that are 3cm, 4cm and 5cm long?
problem

Triangle Shapes

Age

5 to 11

Challenge level

This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.