Angles & Polygons

4. at right angles to the horizon or another object
6. two angles whose sum is 90º
8. a point where two or more rays or the arms of an angle meet
9. a polygon with four angles and four sides
10. an angle measuring 90º or a triangle with one right angle
14. a twelve-sided shape
15. an eight-sided shape
17. a triangle with 3 equal sides and 3 equal angles
21. a seven-sided shape
22. curved outwards; a polygon having all angles smaller than 180º
23. a plane shape having three or more straight sides
25. angle measures between 0º and 90º or a triangle with three acute angles
26. characteristics, properties or features which allow items to be sorted and classified as belonging to a set or group
27. a ten-sided shape
28. lines that are always an equal distance apart; lines that do not/ will not intersect

1. having the same shape and the same size
2. an angle that equals 180º
3. two angles whose sum is 180º
5. having sides, faces or angles of differing sizes
7. any angle between 180º and 360º
10. polygons having all sides equal and all angles equal
11. a triangle with 2 equal sides and 2 equal angles
12. curved inwards; a polygon having one or more angles larger than 180º
13. an eleven-sided shape
16. a six-sided shape
18. a triangle in which all three sides are a different length
19. a five-sided shape
20. any angle between 90º and 180º or a triangle with one obtuse angle
24. a nine-sided shape
25. the amount of turning between two rays called arms meeting at a common point called the vertex