geometry

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Across
  1. 6. two polygons of the same number of sides are similar, if their corresponding sides are ____________
  2. 7. a line intersecting a circle in 2 points is called a _______
  3. 8. a tangent to a circle intersects it in ______ points.
  4. 9. all circles are __________
Down
  1. 1. all squares are __________
  2. 2. how many tangents can a circle have?
  3. 3. two polygons of the same number of sides are similar, if their corresponding angles are ___________
  4. 4. all _________ triangles are similar
  5. 5. a circle can have _________ parallel tangents at most.