Geometry

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Across
  1. 3. The length of a circle
  2. 5. A straight figure extending infinitely in both directions
  3. 6. A flat surface that extends forever
  4. 7. The measurement of an object along the y-axis
  5. 8. The longest side of a right triangle
  6. 11. Ways to change the shape/positions of a figure
  7. 12. The endpoint of an angle
  8. 15. The total space taken up by any shape of an object
  9. 16. The ratio of the circumference of a circle to the diameter
  10. 17. Extends from the center of a circle to the circumference
  11. 19. When 2 lines intersect at 90°
Down
  1. 1. The size of a line segment
  2. 2. The distance around the edge of a shape
  3. 4. When a set of points lie on the same line
  4. 9. Represented by a dot and names a location
  5. 10. When a set of points are on the same plane
  6. 13. A point at the end of a line segment or ray
  7. 14. A measure for angles
  8. 18. When 2 lines meet at a common endpoint
  9. 19. A part of a line that has a starting point but no endpoint