Geometry

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Across
  1. 2. Units inside a shape
  2. 3. Triangle with all equal sides
  3. 8. Perimeter around a circle
  4. 10. Two straight points that are connected
  5. 14. An example that disproves a statement
  6. 15. Something you believe is true
  7. 17. Opposite parallel line
  8. 18. 4-sided shape
  9. 19. Angle under 90 degrees
  10. 20. Two lines that never cross
Down
  1. 1. Triangle with all different lengths
  2. 4. Distance around a shape
  3. 5. Two angles on a line that equal 180 degrees
  4. 6. The same size, angles, and shape
  5. 7. 8 sides. Looks like a stop sign
  6. 9. Angle that is 90 degrees
  7. 11. Space between two lines
  8. 12. Parallel sides with opposite equal sides
  9. 13. When the hypothesis and statement are both wrong
  10. 16. Two lines that cross and make