Geometry Vocabulary

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Across
  1. 5. The distance from one point on a circle through the center to another point on the circle
  2. 9. Two angles that sum equals 180 degrees
  3. 11. Having the same size and shape
  4. 12. A triangle with two sides equal and two angles equal
  5. 14. A triangle with all sides equal
  6. 16. The study of triangles: their angles, lengths and more (especially with right triangles)
  7. 17. A round shaped figure that has no corners or edges
  8. 19. An angle that measures exactly 90 degrees
  9. 22. For a rectangle: length times width
  10. 23. Two lines intersect to form 90 degree angles
  11. 26. The formula used to find missing sides of a right triangle (a^2 + b^2 = c^2)
  12. 30. A one dimensional figure that extends indefinitely in both directions
  13. 31. The study of mathematics that is concerned with measurement and dimensions of objects
  14. 36. Formed when two rays meet at a common endpoint
  15. 37. An angle that measures less than 90 degrees
  16. 38. A polygon with four sides and four angles
  17. 39. A one dimensional figure that has two endpoints
  18. 40. The middle of a line segment
  19. 42. Where two or more line segments meet
  20. 43. Two ratios that are equal to each other
  21. 44. The distance around a polygon
Down
  1. 1. An angle that has a measure greater than 90 degrees
  2. 2. A geometry tool used to measure angles
  3. 3. When writing a proof, you always start with what you are _______.
  4. 4. The unit of measurement for angles
  5. 6. Rise over run
  6. 7. Means to "cut in half"
  7. 8. Having the same shape but not the same size
  8. 9. A triangle with no equal sides and no equal angles
  9. 10. A ________ ________ measures exactly 180 degrees
  10. 13. Two angles that have a sum of 90 degrees
  11. 15. Angles that are next to each other
  12. 18. A geometry tool used to draw circles
  13. 20. Angles that are opposite each other
  14. 21. 3.14159265358979....
  15. 24. Half of the diameter
  16. 25. A polygon with three sides and three angles
  17. 27. Letters of the ______ alphabet are sometimes used in geometry
  18. 28. A one dimensional figure with one endpoint that extends indefinitely in one direction
  19. 29. The property of an object that is able to be divided into mirror halves
  20. 32. A polygon with five sides and five angles
  21. 33. Two lines that never intersect each other
  22. 34. The ratio between the sizes of two similar figures
  23. 35. The distance around a circle
  24. 41. Logical mathematical arguments (theorems, postulates, definitions, etc) used to show the truth of a mathematical statement