Crossword Puzzle

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Across
  1. 2. triangles - Triangles that have the same shape but different sizes.
  2. 5. - A flat, two-dimensional surface that extends infinitely in all directions.
  3. 9. triangle - A triangle with one angle greater than 90 degrees.
  4. 12. - A polyhedron with four triangular faces.
  5. 13. - A location in space with no size or dimension.
  6. 14. triangles - Triangles that are identical in size and shape.
  7. 15. - A 3D shape with six rectangular faces.
  8. 16. lines - Lines that do not intersect and are not parallel.
  9. 17. - A polyhedron with two parallel, congruent bases and rectangular sides.
  10. 18. points - Points that lie on the same plane.
  11. 20. - The amount of space inside a 3D object.
  12. 23. - A 3D shape resembling a flattened sphere.
  13. 24. face - The sides of a 3D figure that are not bases.
  14. 25. - The point where the altitudes of a triangle meet.
  15. 27. circle - A circle that passes through all the vertices of a polygon.
  16. 30. angle - An angle that measures exactly 180 degrees.
  17. 31. - The point where the medians of a triangle meet.
  18. 32. triangle - A triangle with no sides equal in length.
  19. 34. - A part of a circle bounded by an arc and a chord.
  20. 35. angle - An angle that measures more than 180 degrees but less than 360 degrees.
  21. 37. - The total distance around a shape.
Down
  1. 1. - The point or set of points where two figures meet.
  2. 3. angles - Angles on opposite sides of a transversal but inside two lines.
  3. 4. angle - An angle formed inside a polygon by two adjacent sides.
  4. 5. theorem - A formula relating the sides of a right triangle.
  5. 6. triangle - A triangle where all angles are less than 90 degrees.
  6. 7. points - Points that lie on the same straight line.
  7. 8. - A portion of a circle bounded by two radii and an arc.
  8. 10. circle - A circle that fits perfectly inside a polygon, touching all its sides.
  9. 11. - The longest side of a right triangle.
  10. 15. angles - Angles in the same relative position at an intersection of a transversal with two lines.
  11. 19. - The distance from the center of a polygon to the midpoint of one of its sides.
  12. 21. triangle - A triangle with one 90-degree angle.
  13. 22. - The bottom or top face of a 3D shape.
  14. 24. - A straight path that extends infinitely in both directions.
  15. 26. - The point where the perpendicular bisectors of a triangle meet.
  16. 28. - A line segment connecting two non-adjacent vertices in a polygon or polyhedron.
  17. 29. - The point where the angle bisectors of a triangle meet.
  18. 33. angle - An angle formed outside a polygon by extending one of its sides.
  19. 36. - The amount of space inside a 2D shape.