Across
- 2. line segment drawn from a vertex of a triangle perpendicular to its opposite side
- 8. If anyone angle is greater than 90°
- 10. A triangle having three equal sides
- 12. If each angle is less than 90°
Down
- 1. A triangle whose one angle is a right-angle
- 3. A closed curve made of three line segments
- 4. angle of a triangle formed when a side of a triangle is produced
- 5. A triangle having two equal sides
- 6. line-segment joining a vertex of a triangle to the mid-point of its opposite side
- 7. A famous theoreme
- 9. the three angles of a triangle is 180°.
- 11. A triangle having three unequal sides