Across
- 4. a four-sided, or quadrilateral, geometric figure in which all four sides are of the same length and each of the two pairs of opposite sides are parallel to each other.
- 6. a type of quadrilateral, whose opposite sides are equal and parallel.
- 8. a line that passes through two very specific points on a triangle: a vertex, or corner of a triangle, and its opposite side at a right, or 90-degree, angle.
- 12. the point of concurrency of the median in a triangle.
- 14. the point at which the three medians intersect.
- 15. the point where all the three altitudes of the triangle cut or intersect each other.
- 17. divides the opposite side into two parts proportional to the other two sides of the triangle.
- 18. a flat closed shape having 4 straight sides, with one pair of parallel sides.
Down
- 1. a line that bisects a line segment in two equal parts and makes an angle of 90 degrees at the point of intersection.
- 2. a triangle that has all its sides equal in length.
- 3. composed of two congruent triangles.
- 5. a regular quadrilateral, which has all the four sides of equal length and all four angles are also equal.
- 7. shorter diagonal forms two isosceles triangles.
- 9. intersection point of the angle bisectors of the interior angles.
- 10. a line segment joining the vertex of the triangle to the mid-point of its opposite side.
- 11. the point of intersection of all the three interior angle bisectors of the triangle.
- 13. a line segment connecting any two non-consecutive vertices of a polygon.
- 16. having all or corresponding angles equal.