Geometry final project

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Across
  1. 3. =
  2. 6. The area or distance around a circle
  3. 10. a^2 + b^2 = c^2
  4. 11. A unproven statement
  5. 14. A triangle with all unequal sides and angles
  6. 17. A trapezoid with equal sides and angles
  7. 18. A angle less than 90 degrees
  8. 20. A pair of supplementary angles
Down
  1. 1. A flat surface or area
  2. 2. corner of a shape
  3. 4. ━━━━
  4. 5. = △
  5. 7. ◣ ⦜
  6. 8. ◢
  7. 9. ▭
  8. 12. Angle more than 90 degrees
  9. 13. hypothesis and conclusion are reversed
  10. 15. 🛑
  11. 16. 10 sided shape with equal sides
  12. 19. base multiplied by height