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