Across
- 3. passes through midpoints of triangle segments (and other points too!)
- 5. vertices of this triangle are on perpendiculars of sides of another triangle to a fixed point
- 7. equidistant from vertices of triangle
- 8. minimal perimeter triangle inscribed in another triangle
- 9. intersection of altitudes
Down
- 1. intersection of angle bisectors
- 2. degenerate pedal triangle with fixed point on circumscribed circle
- 4. center of mass for a triangle
- 6. through three centers of a triangle