### Seven Sticks

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

### Three Fingers and a Loop of String

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

### Triangle Edges

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

# Let's Investigate Triangles

##### Stage: 1 Challenge Level:

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths.

There are:

• yellow strips with $3$ holes
• black strips with $4$ holes,
• red strips with $5$ holes and
• green strips with $6$ holes.

There are plenty of strips of each colour.

Vincent makes a triangle with a green strip, a yellow strip and a red strip.

Tara makes a triangle with two green strips and one red strip and another triangle with three black strips.

How many different triangles can you make with these lengths?

Can you find three strips which cannot be made into a triangle when you use them together?