Across
- 4. Either of two angles lying on opposite sides of two intersecting lines
- 7. The middle of a line segment with two endpoints
- 8. Two angles whose sum is 90 degrees
- 9. Two angles whose sum is 180 degrees
Down
- 1. Two angles that have the same vertex and a side in common
- 2. Amount of space between two points
- 3. An angle of 90 degrees to a given line, plan or surface
- 5. The space between two intersecting lines or surfaces at or close to the point they meet
- 6. Formed when two lines intersect eachother at a single point