Geometry

3. a 3-sided polygon
5. a solid or hollow object which tapers from a circular or roughly circular base to a point
7. identical in form; coinciding exactly when superimposed.
9. An image or shape as it would be seen in a mirror.
11. the enclosing boundary of a curved geometric figure, especially a circle
12. a round solid figure, or its surface, with every point on its surface equidistant from its center
13. the action of rotating around an axis or center
14. a quadrilateral with both pairs of opposite sides parallel and all sides the same length

1. a round plane figure whose boundary consists of points equidistant from a fixed point
2. lying in the same straight line.
4. the longest side of a right triangle, opposite the right angle
5. a solid geometric figure with straight parallel sides and a circular or oval cross section
6. the quality of being made up of exactly similar parts facing each other or around an axis
8. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere
10. moving a shape without rotating or flipping it