Geometry

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Across
  1. 2. lines that never intersect
  2. 4. a polygon with 5 sides and 5 angles
  3. 7. 4 sided figure
  4. 8. vertical axis of a system of coordinates
  5. 11. a position in a line graph
  6. 13. 3 sided figure
  7. 15. a 90-degree angle
Down
  1. 1. straight line passing through the center of a circle
  2. 3. a straight line extending from the center of a circle or sphere to the circumference or surface
  3. 5. the intersection point of two sides of a plane figure
  4. 6. Horizontal axis of a system of coordinate
  5. 9. an angle less than 90 degrees but greater than 0 degrees
  6. 10. proportional stretch or shrink of an image
  7. 12. the figure formed by two lines
  8. 14. the line connecting the midpoints