Geometry

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Across
  1. 3. A line, line segment, ray, or point that cuts a line segment exactly in half
  2. 5. lying in the same straight line
  3. 6. Space between two intersecting lines or surfaces at or close to the point where they meet
Down
  1. 1. A point in the center joining two points
  2. 2. in the same plane
  3. 4. Identical in form