Basic geometry

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Across
  1. 3. Two lines on a plane that never meet. They are always the same distance apart.
  2. 6. A flat shape with 4 equal sides and every angle is a right angle.
  3. 7. The middle of. The point halfway along.
  4. 8. Where lines cross over (have a common point).
  5. 10. A straight line going through the center of a circle connecting two points on the circumference.
  6. 11. A function word to indicate passage into at one side or point and out at another.
Down
  1. 1. To connect.
  2. 2. Lines that are at right angles (90°) to each other.
  3. 4. The distance from the center to the circumference of a circle
  4. 5. Any of the two furthest points on a line segment.
  5. 9. A vertex / A point where two or more lines meet.