Geometry

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Across
  1. 3. a shape with 8 sides
  2. 4. <---->
  3. 6. a=L*H
  4. 9. A = B. B = C.
  5. 11. ---->
  6. 15. A2 + B2 = C2
  7. 17. two equal numbers opposite of each other on the transversal on two parallel lines.
  8. 18. all the sides of a shape added together
  9. 19. one triangle has three of these.
Down
  1. 1. A shape with 10 sides
  2. 2. a triangle with three unequal sides
  3. 5. If and only if.
  4. 7. p = q -> q = p
  5. 8. a shape with 7 sides
  6. 9. d = (x2-x1)2 +(y2-y1)2
  7. 10. +----+
  8. 12. a dot on a line or plane
  9. 13. an angle smaller than 90 degrees
  10. 14. a line that cuts a shape into two equal sides
  11. 16. 2 numbers on the same side of the transversal between to parallel lines.