Mr. Tyler's Crossword

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Across
  1. 2. The liquid form of ice
  2. 4. A four legged animal that goes woof
  3. 6. A quadrilateral with one set of parallel lines
  4. 7. An object on which you sit
  5. 9. A living organism with petals, a stem, and roots
Down
  1. 1. Lines which never intersect
  2. 3. The bringer of virtual school
  3. 5. A polygon with three sides
  4. 8. A tool to correct the mistakes of a pencil