Geometry Crossword

4. a two-dimensional (flat), four-sided shape where all of the sides are of equal length, and where the opposite sides are parallel.
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 center of mass of a geometric object of uniform density.
14. the point at which the perpendicular bisectors of the sides of a triangle intersect and which is equidistant from the three vertices.
15. the point where all the three altitudes of the triangle cut or intersect each other.
17. a ray, segment, or line that divides a given angle into two angles of equal measures.
18. a quadrilateral that has one pair of parallel sides.

1. a line that intersects another line segment perpendicularly and divides it into two parts of equal measurement.
2. the perpendicular drawn from vertex of the equilateral triangle to the opposite side bisects it into equal halves.
3. a two-dimensional geometrical shape whose sides are parallel to each other.
5. a regular quadrilateral, which has all the four sides of equal length and all four angles are also equal.
7. a quadrilateral with reflection symmetry across a diagonal.
9. at equal distances
10. the middle number in a sorted list of numbers
11. the center of the incircle of a triangle or other figure.
13. a straight line joining two opposite corners of a square, rectangle, or other straight-sided shape.
16. having equal angles