1. Congruent figures: have the same size and shape (ஒத்த வடிவம், ஒரே மாதிரியான அளவுகள்)
2. Similar figures: have the same shape, but are different sizes (ஒத்த வடிவம், ஆனால் வேறு வேறு அளவுகள்)
3. Cube: a cube is a solid shape and it has 6 faces or flat sides shaped like squares. The faces on a cube are all squares. There are 12 edges where the faces meet and there are 8 corners. (கன சதுரம்
4. Cylinder: has 0 corners and a curved surface (உருளை)
5. Face: the flat edge of a solid shape (சமபரப்பு)
6. Edge: the place where two faces come together (ஓரம்)
7. Vertex: another word meaning the "corner" of a shape (முனை, உச்சி)
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