Across
- 3. a poligon with four sides
- 5. a closed plane figure bounded with line segments
- 6. a polygon with three sides
- 8. an angle that equals 90 degrees
- 9. a quadrilateral with four congruent sides and four right angles
Down
- 1. a triangle with three congruent sides
- 2. a polygon with five sides
- 4. a triangle with two congruent sides
- 7. a triangle which angles are less than 90 degrees