Across
- 3. d=(x2-x1)2+(y2-y1)2
- 4. an angle of 90 degrees
- 5. a space where two lines meet
- 11. a pair of opposite angles formed by intersecting lines
- 12. an angle of 180 degrees
- 13. any angle greater than 180 degrees
Down
- 1. when two angles degrees add up to 180
- 2. when two angles degrees add up to 90
- 6. (xm,ym)=(x1+x2/2,y1+y2/2)
- 7. formed when two lines intersect at a single point
- 8. two angles that share a common vertex and side
- 9. any angle 90 degrees and under
- 10. when something is at 90 degrees of a line