Across
- 5. a circle outside of a triangle
- 8. triangle inside a circle
- 9. a plane figure with nine straight sides and nine angles.
- 10. having four straight sides.
- 11. a plane figure with five straight sides and five angles.
- 12. three more sides than pentagon
- 13. a plane figure with six straight sides and angles.
Down
- 1. the center of the incircle of a triangle or other figure.
- 2. a triangle that two sides and two angles are equal
- 3. one more side than hexagon
- 4. a plane figure with ten straight sides and angles.
- 6. a triangle that every sides are equal
- 7. a plane figure with four equal straight sides and four right angles.