Across
- 2. A line segment joining two points on a circle. (5)
- 4. The total distance around a two-dimensional shape. (9)
- 7. Greek mathematician famous for the theorem involving right-angled triangles. (10)
- 10. Whole numbers including negative numbers, zero and positive numbers. (7)
- 12. Represents part of a whole. (8)
- 13. A three-sided polygon. (8)
- 14. The middle value in an ordered data set. (6)
- 16. A line passing through the centre of a circle. (8)
- 18. A triangle with two equal sides. (9)
- 19. The value occurring most frequently in a data set. (4)
Down
- 1. A perfectly round plane figure. (6)
- 3. The slope of a straight line. (8)
- 5. A mathematical statement showing two expressions are equal. (8)
- 6. Lines that never meet. (8)
- 7. A closed figure with three or more sides. (7)
- 8. The distance from the centre of a circle to its circumference. (6)
- 9. A polynomial whose highest power is two. (9)
- 11. A mathematical symbol representing an unknown value. (8)
- 15. A whole number greater than 1 with exactly two factors. (5)
- 17. The arithmetic average of a set of numbers. (4)