Geometry Terms Puzzle

12345678910111213
Across
  1. 5. when something is at 90 degrees of a line
  2. 6. any angle 90 degrees and under
  3. 7. any angle greater than 180 degrees
  4. 10. when two angles degrees add up to 90
  5. 11. d=(x2-x1)2+(y2-y1)2
  6. 12. a pair of opposite angles formed by intersecting lines
  7. 13. an angle of 90 degrees
Down
  1. 1. formed when two lines intersect at a single point
  2. 2. (xm,ym)=(x1+x2/2,y1+y2/2)
  3. 3. an angle of 180 degrees
  4. 4. when two angles degrees add up to 180
  5. 8. two angles that share a common vertex and side
  6. 9. a space where two lines meet