Across
- 5. Pythagoras' favourite triangle!
- 8. A circle whose center is the intersection of two of the definition C
- 9. Connects the midpoint of a side and the opposite vertex
- 10. Their sum is always 180°
- 11. The symmetry axis of a side
Down
- 1. All its angles measure 60°
- 2. Perpendicular to one side and through the opposite vertex
- 3. Three in a triangle
- 4. The symmetry axis of an angle
- 6. A triangle with only one symmetry axis
- 7. Intersection of two of definition A
- 12. A circle whose center is the intersection of two of definition I