Across
- 3. A series of numbers in which each number is the sum of the two preceding ones.
- 7. In a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the other two sides.
- 8. The process of splitting a number into equal parts or groups.
- 9. A number greater than 1 that has no positive divisors other than 1 and itself.
- 12. The operation of finding the difference between two numbers by taking away one from the other.
- 13. The measurement of the extent of a surface enclosed within a set of boundaries.
- 14. The mathematical operation of combining two or more numbers to find their total sum.
- 16. A polygon with three sides and three angles.
- 18. A set of five polyhedrons constructed from identical polygons.
Down
- 1. A spiral whose growth factor is the golden ration.
- 2. A shape consisting of all points in a plane that are a given distance away from a fixed point called the center.
- 4. The beginning number of a series, from which all subsequent numbers derive.
- 5. The distance around the boundary of a two-dimensional shape.
- 6. A value that, when multiplied by itself, gives the original number.
- 10. An arithmetic operation that signifies repeated addition of the same number.
- 11. The study of the occult significance of numbers.
- 15. A polygon with four sides and four angles.
- 17. A comparison of two numbers by division.