Geometry

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Across
  1. 2. a shape with eight sides
  2. 5. a closed plane figure for which all sides are line segments
  3. 7. a shape with three sides
  4. 8. a transformation that makes the shape larger
  5. 9. a line segment that passes between the center of a circle
  6. 10. a shape which all points are at a fixed distance form the center
  7. 11. an angle in a circle with a vertex at the circles center
  8. 15. the longest side of a triangle
  9. 17. next to
  10. 19. to cut into two congruent halves
  11. 20. a figure formed at the intersection of two distinct lines
Down
  1. 1. to be on the same line as
  2. 3. a line segment on the interior of a circle
  3. 4. a flat surface extending in all directions
  4. 5. a shape with five sides
  5. 6. line segment that divides a shave into two congruent halves
  6. 12. equally distant
  7. 13. all points between two given points
  8. 14. a shape with six sides
  9. 16. part of a line starting in one place and going infinitely
  10. 18. a shape with ten sides