Geometry Vocabulary

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Across
  1. 2. Next to each other
  2. 7. In the same plane
  3. 8. Equal to the ratio of the side adjacent to an acute angle to the hypotenuse
  4. 9. The enclosing boundary of a curved geometric figure, especially a circle.
  5. 13. A line segment that goes from one corner of a shape to another directly across from it
  6. 14. All angles less than 90 degrees
  7. 15. Portion of the circumference of a circle
  8. 16. Having all angles equal
  9. 18. Not having any interior angles greater than 180
  10. 20. Either of the two angles of a triangle with a base for a side
Down
  1. 1. Not expressible as a ratio of two integers, having infinite and non-recurring expansion when expressed as a decimal
  2. 3. A line that splits an angle into two equal angles
  3. 4. Of or denoting circles, arcs, or other shapes which share the same centre
  4. 5. Line segment joining two points on a curve
  5. 6. Angle with endpoints on the circumference of a circle
  6. 10. A Greek mathematician
  7. 11. The angle between a side of a polygon and an extended adjacent side
  8. 12. Finding the probability of more than one event occurring at the same time
  9. 17. An angle made from point sitting on a circle’s circumference
  10. 19. Shapes exactly the same size and shape