construction of the acrylic shell

we used hexagons and pentagons to create a spherical shell for the crochets.
firstly we need to know how many pieces of each shapes we need so i created a model to count each shapes.

There were 22 hexagons and 12 pentagons.
Now, we needed to find out the ratio between the side of the shapes and the diameter of the sphere as we will need this data to create the 30cm, 20cm and 10cm spheres.
The side of the shapes was 35mm and the diameter of the sphere was approximately 160mm.
To work out the ratio, I divided the length of the diameter of the sphere to the side of the shape.

The result was 4.6. to get the size of the shape for our spheres, we simply divide the diameter of the sphere by 4.6 and that gives us the size of the sides of the hexagon and the pentagon.