geometry

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Across
  1. 1. A location in space with no size; named with a capital letter
  2. 4. The figure formed by two rays with a common endpoint.
  3. 5. A chord that passes through the center of the circle; it’s twice the radius.
  4. 6. A polygon with all points on its boundary equidistant from the center.
  5. 9. A straight one-dimensional figure extending infinitely in both directions.
Down
  1. 1. A flat two-dimensional surface that extends infinitely in all directions.
  2. 2. A part of a line that starts at a point and extends infinitely in one direction.
  3. 3. A part of a circle’s circumference, usually named by its endpoints.
  4. 7. The fixed distance from the center of a circle to any point on the circle.
  5. 8. A straight path with no thickness that goes on forever in both directions; it contains infinitely many points.