Geometry Vocabulary

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Across
  1. 2. contains two sets of parallel sides that form four 90 ° angles
  2. 3. a point where two or more lines come together; also called a corner on a polygon 5.acute angle- an angle that is less than 90°
  3. 7. contains two sets of parallel sides that are all congruent
  4. 9. angles- angles that are across from each other; they do not share a side or vertex 12.adjacent angles- two angles that are formed with a common side equilateral triangle a 13.triangle with three equal sides
  5. 11. angle- an angle that is exactly 90°
  6. 12. pentagon- a 5-sided polygon
  7. 13. angle- an angle that is exactly 180°
  8. 15. a word meaning equal or same; it is used to describe figures, sides, and angles 32.diagonal- a line that cuts across a figure connecting two vertices that are not adjacent
  9. 17. triangle- a triangle with all acute angles
  10. 19. - a transformation that moves a figure by flipping it across a line
  11. 20. lines- lines that cross at a point
  12. 21. parallel lines- lines that stay same distance from each other forever and never intersect 2.perpendicular lines- lines that cross at a point and form 90 ° angles
  13. 23. an 8-sided polygon
  14. 25. triangle- a triangle with two equal sides
  15. 26. symmetry - a figure has this when a line can divide it into two congruent parts
  16. 27. triangle - A triangle with one right angle
  17. 28. symmetry - a figure has this when can be turned around a point and look exactly the same as its original image after some rotating
  18. 29. a 6-sided polygon
Down
  1. 1. angles- two angles that add up to 90°
  2. 4. - a transformation that moves a figure by turning it
  3. 5. triangle a triangle with one obtuse angle
  4. 6. contains two sets of parallel sides that form four 90 ° angles; all sides are congruent 23.isosceles trapezoid- a quadrilateral that contains one set of parallel sides; also contains two 24.opposite congruent sides
  5. 8. angle- an angle that is more than 90° and less than 180°
  6. 10. angles- the angles on the outside of a figure when the sides are extended
  7. 14. angles- two angles that add up to 180°
  8. 16. angles- the angles inside of a figure; in a triangle, these add up to 180°
  9. 17. contains two sets of parallel sides
  10. 18. a four sided polygon; angles total 360°
  11. 19. - a transformation that moves a figure in a straight line without turning or flipping
  12. 22. trapezoid- a quadrilateral that contains on set of parallel sides and contains two right angles
  13. 24. triangle- a triangle with no equal sides