D9. The translational symmetry
The translational symmetry of the friezes
A translational symmetry makes an object match with its transformation. The friezes are formed by many repeated images and have many translational vectors, but all of them are multiple of a non-null vector.
1st. Activate the "Move" tool 
and drag the points until the frieze and its image match. You must find the smallest non-null vector.
The two curved arrows located in the upper right corner of the Graphics View allow you to reset the activity.
If the activity is correct, you will get 10 points automatically.
and drag the points until the frieze and its image match. You must find the smallest non-null vector.
The two curved arrows located in the upper right corner of the Graphics View allow you to reset the activity.
If the activity is correct, you will get 10 points automatically.