Alex's chapter 6 crossword

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Across
  1. 1. A type of quadrilateral, whose opposite sides are equal and parallel
  2. 3. A regular quadrilateral, which has all the four sides of equal length and all four angles are also equal
  3. 6. A quadrilateral with four equal sides. Its opposite sides are parallel, and opposite angles are equal.
  4. 7. The orthocenter is the point where all three altitudes of the triangle intersect. An altitude is a line which passes through a vertex of the triangle and is perpendicular to the opposite side.
  5. 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
  6. 10. The ________ is the center point of the object
  7. 13. A line that bisects another line segment at a right angle, through the intersection point
  8. 15. A quadrilateral with two pairs of parallel sides
  9. 16. A triangle that has all its sides equal in length.
  10. 17. A ________ is a line segment connecting the opposite vertices (or corners) of a polygon
  11. 18. A point which is at the same or equal distance from two given points
Down
  1. 2. The point where the triangle's three perpendicular bisectors intersect
  2. 4. A quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other
  3. 5. A line that splits an angle into two equal angles
  4. 9. The intersection point of all the three interior angle bisectors of the triangle
  5. 11. A four-sided shape which has one pair of sides as parallel
  6. 12. A line segment that joins a vertex to the mid-point of the side that is opposite to that vertex
  7. 14. A triangle with equal angles