Across
- 2. unit of area
- 5. a triangle with one angle of 90 degrees
- 6. a triangle with one obtuse angle
- 7. the sum of the lengths of a polygon's sides
- 10. a polygon with all sides the same length and all congruent angles
- 11. the shape formed by two intersecting lines
Down
- 1. a triangle with at least two congruent sides
- 3. a triangle with three congruent sides
- 4. a two dimensional shape
- 8. a multi-sided shape
- 9. the point with two sides intersect