Radian (biomechanics assignment)

Paper details:

The attached photo shows the definition of radian in which both the radius and arc are equal to 4 shrimps. Use anything you can find in your house and come up with a photo that depicts the definition of ‘radian’ accurately. If your picture does not show the definition accurately, you won’t earn any point. The best picture will earn additional extra points. please i want the best picture i need the extra point an attached picture showing an example but i want a better picture