Geometry

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Across
  1. 2. perfectly straight and extends till indefinitely in both directions.
  2. 4. surface of wall is example of
  3. 6. Seeing from earth, a star in the sky looks like a
Down
  1. 1. _____ of paper is example of line segment
  2. 2. has two end points and named by its end points.
  3. 3. named by its endpoint first followed by another point on it
  4. 5. Plane has _____ thickness