Across
- 6. Slanted square
- 8. The distance around the edge of a circle
- 9. The straight line that passes through the center of a circle and connects two points on its edge
- 10. Slanted rectangle
- 11. Quadrilateral with four equal sides and four right angles
- 12. Another word for altitude
Down
- 1. 2D Shape with three sides
- 2. A line segment from the center of a circle to its edge
- 3. The total distance around a 2D shape
- 4. Half
- 5. The bottom of a triangle
- 6. Quadrilateral with two pairs of equal sides and four right angles
- 7. The amount of space inside a 2D shape