maths

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Across
  1. 6. total distance around outside of a figure
  2. 8. comparison of quantities measured in same units
  3. 9. where 2 faces of a 3-d object meet
  4. 11. pair of equations with no solution
Down
  1. 1. 3-d object with 2 parallel circular bases
  2. 2. a polygon with infinite sides
  3. 3. angle formed by line of sight with horizontal
  4. 4. point at which 2 or more edges of a figure meet
  5. 5. use of a raised number to note repeated multiplication
  6. 7. a line which intersects the circle at one point
  7. 10. distance of a point from y axis
  8. 12. polygon with 8 sides