Equivalent figures : Square equivalent [I]
Geometric figures can be compared with each other by reference for this comparison both its shape and its size.
Based on the different combinations that can be found in these comparisons will classify in:
Similar forms: Have the same shape but different size
Equivalent forms: They have different but equal size (Volume of the area)
Congruent shapes: Have the same shape and size (equal)
Overall, to obtain a form equivalent to another given, use an equivalent square as intermediate between two equivalent figures. Thus, first discuss how to obtain a square equivalent to a geometric figure.