Geometry Vocabulary

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Across
  1. 1. 2 angles next to each other (adjacent)that when you add them together they = 180
  2. 3. tool shaped like a "t" that can be used to: draw a straight line, check for a 90 degree angle, and measure the length of a line segment
  3. 5. "v" shaped tool with a point at one end and pencil on the other. It is used to draw arcs and circles
  4. 11. a triangle made up of 3 acute angles
  5. 12. a triangle with an obtuse angle
  6. 13. an angle that measures anywhere between 91 and 180
  7. 16. a series of points joined together that extend in opposite directions forever
  8. 18. triangle with 2 equal sides and 2 equal angles
  9. 19. a triangle with a right angle
  10. 20. a shape with 3 sides, 3 angles, and 3 vertices
  11. 24. formed by two lines that share a common end point
  12. 25. the original number flipped upside down with the opposite sign
  13. 28. tool with an edge that is straight and is used to draw a straight line
  14. 30. number that tells you how steep a line is
  15. 31. to turn something so it is the mirror image of itself
  16. 32. triangle with 3 equal sides and 3 equal angles
  17. 33. a line that starts at a given point and goes off in one direction without stopping
  18. 35. tool shaped like a half moon used to measure angles
  19. 37. 2 angles that have the same measurement
Down
  1. 2. an angle that measures less than 90
  2. 4. the angle formed when 2 perpendicular lines cross and perfectly square
  3. 6. any 2 angles that are next to one another and share the same vertex
  4. 7. 2 lines that cross one another and form right angles
  5. 8. 2 angles that are formed when 2 lines cross. they are also congruent.
  6. 9. the point where the two lines meet in an angle
  7. 10. a specific location and is drawn as a dot
  8. 14. 2 triangles that have different sides but equal angles
  9. 15. lines that have no points in common and never cross
  10. 17. moving a shape without turning or flipping it
  11. 21. straightedge with measurement marks to determine the length of a line segment
  12. 22. a series of points joined together with a starting and ending point
  13. 23. triangle with no equal sides and no equal angles
  14. 26. changing the size of a shape but keeping the shape the same
  15. 27. tool with a solid based and evenly spaced pegs used with rubber bands to create various shapes
  16. 29. to rotate the shape around a fixed point
  17. 34. an angle that measures 180. it is also a straight line
  18. 36. 2 angles next to each other (adjacent) that when you add them together they = 90