Across
- 4. - is an abbreviation for the Latin phrase "quod erat demonstrandum" ("that which was to be demonstrated")
- 5. - are the angles opposite each other when two lines cross.
- 7. – a shape with four equal straight sides and four right angles.
- 11. - Alternate angles are angles that are in opposite positions relative to a transversal intersecting two lines.
- 15. – a eight-sided polygon. The total of the internal angle is 1080 degrees
- 17. – lines that never cross each other - they keep the same distance apart from each other.
- 18. any pair of angles each of which is on the same side of one of two lines cut by a transversal and on the same side of the transversal.
- 21. – two angles whose sum is equal exactly 90 degrees
- 22. an angle which ranges between 90 and 180 degrees
- 23. – is an angle that ranges between 181-359 degrees
- 24. – an angle that ranges between 0 and 90 degrees
- 25. - a 360° angle, a full rotation
Down
- 1. – a triangle with 2 equal sides and 2 equal angles
- 2. – an angle which equals exactly 180 degrees and is a straight line
- 3. – a triangle with three equal straight lines and three 60-degree angles
- 6. - a six-sided polygon. The total of the internal angles of this shape is 720 degrees
- 8. - each angular point of a polygon, polyhedron, or other figure.
- 9. - a simple quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.
- 10. - a straight line which touches the circle at only one point
- 12. – a triangle that has no equal sides or no equal angles
- 13. - a straight line segment whose endpoints both lie on a circular arc.
- 14. – two angles whose sum is equal exactly 180 degrees
- 16. - a five-sided polygon. The total of the internal angles is 540 degrees
- 19. – an angle which is exactly 90 degrees
- 20. - 4 straight sides, with one pair of parallel sides.