Geometry

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Across
  1. 2. Portion of a curve in a circle
  2. 5. A point at which edges meet
  3. 7. Triangle that forms 90degree
  4. 9. A shape bounded by three or more sides
Down
  1. 1. Two or more lines which cross each other
  2. 3. A region in the interior of a chord
  3. 4. The longest chord
  4. 6. A 3D shape with two identical rectilinear faces with all other quadrilateral faces
  5. 7. Portion of a line starting at a point and going in one direction endlessly
  6. 8. Two faces of a 3d shape that meets at a line segment