geometry

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Across
  1. 2. the part of a straight line considered as originating at a point on the line and as extending in one direction from that point
  2. 4. an angle that measures more than 90 degrees and less than 180 degrees.
  3. 7. lines in a plane that are always the same distance apart.
  4. 8. combination of a vertex and 2 rays
  5. 9. a quadrilateral with one pair of opposite sides parallel
Down
  1. 1. a polygon made up of 8 sides
  2. 3. each angular point of a polygon, polyhedron, or other figure.
  3. 5. obtuse,isosceles, and equilateral
  4. 6. a plane figure with four equal straight sides and four right angles.
  5. 10. a quadrilateral with all equal sides