Use the words in the box to complete these sentences:

1. A ________________ is a dot that represents something's position in space. It has __________________ dimensions.
2. Two lines that cross each other are called ___________________ lines.
3. A _____________ is a straight path of points that continues forever in both directions.
4. A _____________ is a straight path of points that starts at one point and continues forever in one direction.
5. Two lines that meet at a 90° angle are called ____________________ to one another.
6. A line that runs straight up and down is a ___________________ line.
7. Two lines that run in the same direction and never meet are called __________________ lines.  These lines are always the same distance apart.
8. A line that runs parallel to the horizon is a _____________________ line.
9. A part of a line is a _______________________. It is a straight path of points that starts at one point and ends at a second point.
10. A ____________________ is a line that intersects two parallel lines at different points.
11. We don't use square or cubic units when we measure a line. Instead, we use a ____________________________________.
12. Lines, rays, and line segments have ________ dimension.

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