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.

Problem

Take a 25-30 cm piece of string and knot it to make a loop. (Or you could use a rubber band).

Image
Three Fingers and a Loop of String


Hook the loop around three fingers and stretch it tight to make a triangle. Move your fingers around to change the triangle. Draw the triangles you make, then sort them into groups.