Geometry

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Across
  1. 2. I am the distance between two points on the circumference of the circle.
  2. 4. I have 2 pairs of Parallel lines but my angles are not of the equal size.
  3. 5. I have 1 pair of parallel lines.
  4. 6. I have 2 identical rectilinear faces and the rest of my faces are quadrilaterals.
  5. 8. I am a closed figure made of line segments that are equal to or more than 3.
  6. 9. A pyramid's triangular faces meet at this point.
Down
  1. 1. I am an angle bigger than 180° but smaller. than 360°.
  2. 3. I am the perimeter of the circle.
  3. 4. I am a flat surface of any shape that could go on forever.
  4. 7. I am an exact location on a plane surface.