boby's crossword

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Across
  1. 3. three-sided closed polygon
  2. 4. triangle- a triangle with one obtuse angle
  3. 5. Triangle-two sides the same length
  4. 6. a segment from the vertex to the midpoint of the opposite side
  5. 8. angle- the relationship involving two sides and the angle they form
  6. 10. triangle- a triangle with three equal angles
  7. 12. a four-sided closed figure
  8. 14. Sum Theorem- the sum of measures of the interior angles of a triangle that is 180 degrees
  9. 16. side- the side across from an angle
  10. 19. an operation that moves or changes a geometric figure in some way to produce a new figure called an image
  11. 21. angles- the angles that form linear pairs with the interior angles
  12. 23. triangle- no sides the same length
Down
  1. 1. the perpendicular segment from a vertex to the opposite side or to the line that contains the opposite side
  2. 2. segment that connects the midpoints of two sides of a triangle
  3. 4. angle- the angle across from a side
  4. 7. triangle- all sides the same length
  5. 9. a line measured by how steep it is
  6. 11. triangle- a triangle with one right angle
  7. 13. angles- the angles inside a polygon
  8. 15. side- the side connecting two vertices of a triangle
  9. 17. a quadrilateral with two pairs of parallel lines
  10. 18. motion- when an object is moved from one location to another and the size and shape of the object have not changed
  11. 20. angles- an angle within a shape that contains the base of the shape as one of its sides
  12. 22. triangle- a triangle with three acute angles