The image shows an incomplete geomagic square. Similar to the magic squares in which when adding all the numbers of a row, column or diagonal we always get the same result, in this geomagic square if we put all the pieces of a row, column or diagonal together we always get a cube of the same size. In this case, in addition, a formula is shown that allows you to calculate the pieces of each box from 3 different figures to, b Y c.
Thus, the figure of each box is formed by joining the figures to, b Y c according to the formula contained in the box.
Find the figures a, b and c.
Extracted from the page www.geomagicsquares.com where you will find many geomagic squares.
The image shows the solution: