Problem

Exercises through are concerned with art works of M. C. Escher. Neglect the shading in the...

Exercises through are concerned with art works of M. C. Escher. Neglect the shading in the figures and assume the markings in each human figure, reptile, or horseman are the same, even though they may be invisible due to shading. Answer the same questions (a), (b), and (c) that were asked and also answer this part(d). The Study of Regular Division of the Plane with Horsemen in Fig.

d. Assuming horizontal and vertical coordinate axes with equal scales as usual, give vectors in the two nonpar-allel directions of vectors that generate the translation subgroup. Do not concern yourself with the length of these vectors.