Across
- 4. a straight line that touches the outside of a curve but does not cross it
- 5. “to cut”
- 7. a line that goes around a circle or any other curved shape; the length of this line
- 9. half of the diameter
- 10. a flat shape with eight straight sides and eight angles
- 13. triangle with the same side length on two sides
- 15. the portion of a circle enclosed by two radii and an arc
- 16. a flat shape with ten straight sides and ten angles
- 18. the point where the internal angle bisectors of the triangle cross
- 20. triangle with the same side length on three sides
- 21. the intersections of the triangles’ medians
- 22. two circles only contact on one point, and they are on the different side
- 25. the set of points which are an equal distance to a fixed point
- 29. of a regular polygon is a line segment from the center to the midpoint of one of its sides
- 31. a flat shape with twelve straight sides and twelve angles
- 33. two unparallel lines may have
- 34. having four straight equal sides and four angles of 90°
Down
- 1. a flat shape with three straight sides and three angles
- 2. the angle inside two adjacent sides of a polygon
- 3. two circles only contact on one point, and they are on the same side
- 6. the intersections of the triangles’ angular bisectors is the center of the circle
- 8. the vertexes of the triangles are all on the circle
- 11. a flat shape with four straight sides
- 12. a straight line going from one side of a circle or any other round object to the other side, passing through the centre
- 14. 180°- interior angle
- 17. 90°
- 19. a flat shape with six straight sides and six angles
- 23. polygon with the same interior angles and sides’ lengths.
- 24. a flat shape with nine straight sides and nine angles
- 26. dividing something into two equal parts
- 27. a flat shape with at least three straight sides and angles, and usually five or more
- 28. a line segment joining two points on a curve
- 30. a flat shape with five straight sides and five angles
- 32. a flat shape with seven straight sides and seven angles