3D model of a formula in a square. Print out the 3D model and explain the formula to your child using the example of a square. Saving time in school. After such a visual explanation, math will become easier. The figures show the individual members of the formula. You can also download other 3D models of geometric shapes (https://www.cgtrader.com/3d-print-models/science-что?author=viteker85q)! if you need other 3D model formats, please contact me!