tessellations, translation, rotation, reflation, symmetry

In Te Ngahere we have been learning about tessellations, translations,  rotations, reflections and symmetry. What does tessellation mean?  Tessellation means the process of covering a surface with one single shape with no gaps or overlaps. We also had to write what does translation mean? Translation means sliding a shape across the surface. What does rotation mean? Rotation means turning.a shape on its own axis.What does reflection mean? Reflection means flipping a shape. What does symmetry mean? Symmetry means making a mirror image of a shape.