| Geometry is a part of mathematics concerned | | | | Theorem, circumference and area of a circle, area |
| with questions of size, shape, and relative position | | | | of a triangle, volume of a cylinder, sphere, and a |
| of figures and with properties of space. | | | | pyramid are all part of geometry. |
| Geometry is one of the oldest sciences where | | | | The study of geometry gives answers to |
| the answers to basic questions are only | | | | complicated questions like: What is the maximum |
| approximations. | | | | number of spheres simultaneously touching a |
| Geometry which is concerned with | | | | given sphere of the same radius (kissing number |
| measurements, areas, and volumes, originated as | | | | problem)? What is the densest packing of spheres |
| a practical science. Hard to learn formulas for | | | | of equal size in space (Kepler conjecture)? |
| lengths, areas and volumes, such as Pythagorean | | | | |