Geometry Puzzle

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Across
  1. 1. Switching the hypothesis and conclusion of a conditional statement and negating both
  2. 5. consists of three positive integers a, b, and c, such that a2 + b2 = c2
  3. 8. The distance formula is derived by creating a triangle and using the Pythagorean theorem to find the length of the hypotenuse
  4. 9. the relationship between two things when the quantities of the two are equal in ratios
  5. 11. a relationship between two numbers indicating how many times the first number contains the second.
  6. 13. of a circle is the (linear) distance around it
  7. 15. A line that cuts across two or more (usually parallel) lines
  8. 17. O/A
  9. 18. a branch of mathematics that studies relationships involving lengths and angles of triangles
  10. 20. a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length)
Down
  1. 2. any object in the real world.
  2. 3. a fundamental relation in Euclidean geometry among the three sides of a right triangle
  3. 4. circles in a common plane that intersect in a single point.
  4. 6. is greater than either of the measures of the remote interior angles
  5. 7. a statement believed to be true based on observations
  6. 10. each angular point of a polygon, polyhedron, or other figure.
  7. 12. O/H
  8. 14. A/H
  9. 16. having the same shape; having corresponding sides proportional and corresponding angles equal: similar triangles
  10. 19. A solid figure bounded by a cylinder and two parallel planes intersecting the cylinder