### Let's Investigate Triangles

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?

### 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.

# Shapely Lines

##### Stage: 1 Challenge Level:

Here are some photos sent to us by  children at Aycliffe Drive Primary School:

Jonathan's picture:

Jonathan's Key:

• Quadrillaterals are blue; I know this because they have 4 sides.
• Right angle triangles are light brown; they have one right angle, 3 sides and 3 angles.
• Scalene triangles are pink; I know this because I went on the computer and found out a scalene triangle has 3 unequal sides and 3 angles.
• Irregular pentagons are black; they have 5 unequal sides and angles.
• Obtuse triangles are green; these are triangles with one obtuse angle.

Other pictures sent into us by Callum and Chloe at Aycliffe Drive Primary School:

Great use of colours and patterns to differentiate between triangles, quadrilaterals and pentagons.