Across
- 5. A quadrilateral in which opposite sides are parallel
- 6. It is a curve which does not cross itself
- 8. It is also called repeated subtraction
- 10. A type of triangle with no sides equal
- 12. A polygon which is made up of 3 line segments
- 13. The continuous line forming the boundary of a closed figure
- 15. If 2 adjacent angles are supplementary they form a _.
- 16. Perimeter of a circle
- 17. The study of shapes
- 19. The collection of rational and irrational numbers
Down
- 1. It it also called repeated addition
- 2. The side which is opposite to the right angle in a right angled triangle
- 3. A type of triangle with just 2 sides equal
- 4. A straight line from the centre to the circumference of a circle
- 7. An angle of measure greater than 0 degrees but less than 90 degrees
- 9. A straight line passing from side to side through the centre of a circle
- 11. These are assumptions which are universal truths and do not need to be proven
- 12. They need to be proved using statements
- 14. A round shape which has no edges or corners
- 18. The collection of positive and negative numbers