Emil's Crossword

1. A shape with seven sides
6. A shape with ten sides
9. Lisa remarked that the stop sign was very _____________
11. A continuing sound especially in a person where the pitch doesn't change
13. A polygon with nine sides
15. An oxide containing two atoms of oxygen in its molecule or empirical formula
16. The lower division of the seven liberal arts consisting of grammar, logic, and rhetoric
17. A plane figure with four straight sides and angles or a quadrilateral
18. A group or set of nine

2. A shape with five sides
3. Judging by the rats scurrying across the store floor, Matthew felt that he and his friends had a...slight _________
4. A shape with six sides
5. An entire line of numbers with sixteen possible values for each digit
7. A hydrocarbon found in gasoline
8. A long speech spoken by a person in a single conversation
10. A line of verse consisting of seven metrical feet
12. A line of a verse consisting of five metrical feet, or two halves each of two feet and a long syllable
14. One of four joint rulers
15. A span of ten years
16. A three pronged spear