Introduction to Geometry

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Across
  1. 3. The point where the arms of an angle meet is called the ___.
  2. 6. If two lines PQ and RS intersect at T, T is called the point of ___ of PQ and RS.
  3. 7. An angle greater than 90 degrees and less than 180 degrees is called ___ angle.
  4. 9. A 180-degree angle is called ___ angle.
  5. 10. A 360-degree angle is called ___ angle.
  6. 13. Part of the circumference of a circle.
  7. 16. If two straight lines on the same plane do not intersect no matter how far they extend, they are called ___ lines.
  8. 18. A solid enclosed by polygons only.
  9. 21. An angle greater than 0 degrees and less than 90 degrees is called ___ angle.
  10. 24. The length of a circle.
  11. 27. A line segment that joins the centre and any point on a circle.
  12. 30. A triangular pyramid.
  13. 32. The line segment that joins any two non-adjacent vertices of a polygon.
  14. 33. A polygon with all interior angles equal is called ___ polygon.
  15. 34. A triangle with all sides equal is called ___ triangle.
Down
  1. 1. An angle greater than 180 degrees and less than 360 degrees is called ___ angle.
  2. 2. A line ___ is a part of a line which has two end points and a fixed length.
  3. 4. We use a ___ to represent a position in space.
  4. 5. A ___ is made up of an infinite number of points and it has no thickness or width.
  5. 7. A 8-sided polygon.
  6. 8. A ___ contains an infinite number of lines and it has no thickness.
  7. 11. If the sum of two angles is 180 degrees, they are ___.
  8. 12. A 4-sided polygon.
  9. 14. If two straight lines intersect and form a right angle, they are called ___ lines.
  10. 15. A polygon with at least one of the interior angles greater than 180 degrees is called ___ polygon.
  11. 17. A 6-sided polygon.
  12. 19. All prisms and circular cylinders are solids with ___ cross-sections.
  13. 20. A polygon with all interior angles less than 180 degrees is called ___ polygon.
  14. 22. A triangle with all sides unequal is called ___ triangle.
  15. 23. A triangle with two sides equal is called ___ triangle.
  16. 25. A polygon with all sides equal and all interior angles equal is called ___ polygon.
  17. 26. A 90-degree angle is called ___ angle.
  18. 28. A 7-sided polygon.
  19. 29. A 5-sided polygon.
  20. 31. A line segment that joins two points on a circle and passes through the centre of a circle.