Across
- 4. Triangle/ all sides have the same length
- 6. Angle/ less than ninety degrees but more than zero degrees
- 7. two lines on a plane that never meet
- 8. to a plane curve at a given point is the straight line that "just touches" the curve at that point.
- 10. line that divides something into two equal parts
- 11. circle is a geometric line segment whose endpoints both lie on the circle
- 12. Angles/ angles in matching corners
- 13. the endpoint of a segment, then it is on the perpendicular bisector of the segment.
- 14. of the plane that slides every point of a figure the same distance in the same direction
- 18. Triangle/ two sides are equal in length
- 19. a motion of a certain space that preserves at least one point
- 20. a piece, or part, of a line in geometry
- 22. a straight line extending from the center of a circle or sphere to the circumference or surface; is half the diameter
- 24. a flat, two-dimensional surface
Down
- 1. Triangle/ has three unequal sides
- 2. lines that are at 90° to each other
- 3. Angles/ two lines are crossed by another line, the pairs of angles opposite sides
- 5. a point where two or more straight lines meet
- 9. the set of points that are equidistant from a special point in the plane
- 15. across a line, creating a mirror image
- 16. Angle/ more than 90 degrees but less than 180 degrees
- 17. a primitive notion upon which the geometry is built
- 20. line of a curve is a line that intersects two points on the curve
- 21. Angle/ equal to 90 degrees
- 23. an independent object, distinct from the set of points which lie on it