Across
- 4. A part of a line that starts at an endpoint and extends infinitely in one direction.
- 7. Interior Angles Interior angles on the same side of a transversal; supplementary if lines are parallel.
- 8. Lines Lines in the same plane that never intersect.
- 9. A flat surface that extends infinitely in all directions; defined by three non-collinear points.
- 10. Interior Angles Non-adjacent angles on opposite sides of a transversal, inside the two lines; congruent if lines are parallel.
- 13. Angles Angles in matching corners when two lines are cut by a transversal; congruent if lines are parallel.
- 14. Lines Lines that intersect at a right angle (90°).
Down
- 1. Points Points that lie in the same plane.
- 2. A straight path with no thickness that extends infinitely in both directions.
- 3. Segment A part of a line with two distinct endpoints.
- 5. A location in space with no size or dimension, usually represented by a dot and a capital letter.
- 6. Points Points that lie on the same straight line.
- 7. A measure of the steepness of a line, calculated as rise over run; perpendicular slopes are negative reciprocals.
- 11. A line that intersects two or more lines at distinct points.
- 12. Formed by two rays sharing a common endpoint, called the vertex.