Across
- 2. the continuous line forming the boundary of a closed geometric figure.
- 7. the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse.
- 8. a triangle) having sides unequal in length.
- 10. each angular point of a polygon, polyhedron, or other figure.
- 13. a triangle) having two sides of equal length.
- 15. a plane figure with 9 straight sides and angles.
- 19. the quality of being made up of exactly similar parts facing each other or around an axis.
- 20. a plane figure with four equal straight sides and four right angles.
- 21. the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.
- 23. Lying next to each other.
- 26. The part of a circle made by a line and a connecting arc.
- 27. a plane figure with at least three straight sides and angles.
Down
- 1. A straight line at an angle of 90° to a given line, plane, or surface.
- 3. Curved inwards.
- 4. unproven statement which is supported by all the available data and by many weaker results.
- 5. a plane figure with seven straight sides and angles.
- 6. The part of a conditional statement after then.
- 9. a plane figure with twelve sides.
- 11. a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
- 12. A line with a start point but no end point.
- 14. the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.
- 16. a plane figure with eight straight sides and eight angles.
- 17. a plane figure with three straight sides and three angles.
- 18. reasoned, logical explanations that use definitions, axioms, postulates, and previously proved theorems to arrive at a conclusion about a geometric statement.
- 22. A long thin mark made by a pen, pencil, etc.
- 24. A plane figure with ten straight sides and angles.
- 25. A result that has been proved to be true.