My innovative work

Circles and triangles have lots of properties. These properties are discussed in the high school classes.. 
My innovative work helps the students to understand these properties through demonstration.. 

This is a working model which comprises of a wooden circular piece mounted on a rectangular slab. Nails are erected on the circular piece which is used to hold the elastic bands. 

Working:-

The two ends of the elastic bands are secured on two different nails to demonstrate the chord of the circle. These bands are then put on different nails one after the other and hence  to demonstrate the different properties.