Across
- 1. Point where perpendicular bisectors meet; equidistant from vertices.
- 3. Triangles Triangles with equal sides and angles.
- 6. All angles are less than 90 degrees (Triangle).
- 10. Angle Theorem Exterior angle equals sum of remote interior angles.
- 12. Three matching sides guarantee congruence.
- 13. Bisector Line cutting a side in half at 90 degrees.
- 15. Has one 90 degree angle (Triangle).
- 18. Bisector Line dividing an angle into two equal angles.
- 19. Connects a vertex to the midpoint of the opposite side.
- 20. Sum Theorem Interior angles add up to 180 degrees.
Down
- 2. Three equal sides and three equal 60 degree angles (Triangle).
- 4. All sides and angles are different (Triangle).
- 5. Segment from a vertex perpendicular to the opposite side.
- 7. Has one angle greater than 90 degrees (Triangle).
- 8. Point where medians meet; center of mass.
- 9. Point where angle bisectors meet; equidistant from sides.
- 11. Point where altitudes meet.
- 14. Two equal sides and two equal base angles (Triangle).
- 16. A polygon with three sides.
- 17. Inequality Theorem Any two sides must sum to more than the third.