Across
- 2. an equilateral parallelogram, including the square as a special case.
- 4. connecting two nonadjacent angles or vertices of a polygon or polyhedron, as a straight line.
- 6. an instrument having a graduated arc for plotting or measuring angles.
- 8. the outer boundary, especially of a circular area; perimeter
- 9. forming a complement; completing.
- 11. (of straight lines) lying in the same plane but never meeting no matter how far extended.
- 14. a polygon with four sides.
- 16. the space within two lines or three or more planes diverging from a common point, or within two planes diverging from a common line.
- 17. a quadrilateral having both pairs of opposite sides parallel to each other.
- 18. a continuous extent of length,straight or curved.
- 19. a point at or near the middle of, or equidistant from, both ends, as of a line
- 20. meeting a given line or surface at right angles.
- 21. of or relating to two numbers related by a congruence.
- 23. a triangle with three unequal sides
- 25. a finite section of a line.
- 26. an angle less than 90 degrees
- 27. an angle of 180 degrees
- 29. a parallelogram having four right angles. The two sides that are perpendicular are equal in length
- 30. a triangle with two sides equal
- 32. a polygon having five angles and five sides.
- 34. a triangle having a right angle
- 35. two angles having the same vertex and having a common side between them.
- 39. a polygon having six angles and six sides.
- 40. a polygon having ten angles and ten sides.
- 41. the intersection of two sides of a plane figure.
Down
- 1. a figure, especially a closed plane figure, having three or more,usually straight, sides.
- 3. a polygon having seven angles and seven sides.
- 5. one of two opposite and equal angles formed by the intersection of two lines.
- 6. a mark made with or as if with the sharp end of something
- 7. one of a system of straight lines emanating from a point.
- 10. a triangle with all sides equal
- 12. an angle greater than 90 degrees but less than 180 degrees
- 13. the angle formed by two perpendicular lines that intersect; an angle of 90°.
- 15. any particular extent of space or surface; part:
- 22. a triangle with one obtuse angle
- 23. a rectangle having all four sides of equal length.
- 24. a triangle with only acute angles
- 28. a quadrilateral plane figure having two parallel and two non parallel sides.
- 31. a closed plane figure having three sides and three angles.
- 32. a flat or level surface.
- 33. a polygon having eight angles and eight sides.
- 36. a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end.
- 37. a straight line extending from the center of a circle or sphere to the circumference or surface
- 38. a closed plane curve consisting of all points at a given distance from a point within it called the center.