chapter 6-7 crossword puzzle

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Across
  1. 2. of a triangle is a triangle center, a point defined for any triangle in a way that is independent of the triangle's placement or scale.
  2. 4. a quadrilateral whose four sides all have the same length.
  3. 5. a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge.
  4. 8. a line segment through a vertex and perpendicular to a line containing the side opposite the vertex.
  5. 9. a quadrilateral with reflection symmetry across a diagonal.
  6. 10. the intersection point of the altitudes drawn from the vertices of the triangle to the opposite sides.
  7. 12. the value separating the higher half from the lower half of a data sample, a population, or a probability distribution.
  8. 13. a quadrilateral with four right angles.
  9. 15. a regular quadrilateral, which means that it has four equal sides and four equal angles.
Down
  1. 1. the point of intersection between the three perpendicular bisectors of the triangle's sides
  2. 3. a simple quadrilateral with two pairs of parallel sides.
  3. 6. the arithmetic mean position of all the points in the surface of the figure
  4. 7. a quadrilateral that has at least one pair of parallel sides.
  5. 8. a line that splits an angle into two equal angles.
  6. 11. a polygon whose vertex angles are equal.
  7. 14. at equal distances.