Across
- 3. A 3D shape with two identical, parallel ends (bases) and flat sides.
- 8. A 3D shape with a polygonal base and triangular faces that meet at a point (apex).
- 10. A polygon with eight sides.
- 12. A polygon with four sides and four angles.
- 17. A triangle with all three sides of equal length.
- 21. The line segment where two faces of a solid figure meet.
- 22. A quadrilateral with two pairs of parallel sides.
- 24. A 3D square shape with 6 equal square faces, 12 edges, and 8 vertices.
- 25. A 2D shape with four right angles and opposite sides that are parallel and equal.
- 26. A special rectangle with all four sides of equal length.
- 27. The distance around the edge of a circle.
- 28. Two lines or line segments that intersect at a right angle (90°).
Down
- 1. A triangle with at least two sides of equal length.
- 2. A closed 2D shape made up of straight lines.
- 4. Two lines that are always the same distance apart and never meet.
- 5. The distance from the center of a circle to its circumference.
- 6. A triangle with all three sides of different lengths.
- 7. The corner point where two or more line segments meet (plural: vertices).
- 9. Angle An angle of exactly 90°.
- 11. An angle greater than 90° but less than 180°.
- 13. A straight line passing from one side of a circle to the other through its center; twice the length of the radius.
- 14. A polygon with six sides.
- 15. A polygon with five sides.
- 16. A perfectly round 3D shape where every point on its surface is the same distance from its center.
- 18. An angle less than 90°.
- 19. A 2D shape with four equal sides and opposite sides parallel.
- 20. A flat surface of a three-dimensional shape.
- 23. A quadrilateral with at least one pair of parallel sides.