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Across 2. Quadrilateral with two sets of parallel sides 7. Is the middle point of a line segment 9. together they make a right angle.(SUM 90) 10. Is a measurement of plane angle 11. An infinitely-extending one-dimensional figure that has no curvature 12. Pairs of angles whose measures add up to 180 degrees 13. Sides (or angles) are different 14. Following one after another without interruption 19. Polygon with 3 sides 21. A line joining a vertex of a triangle to the midpoint of the opposite side 23. A flat surface 24. A path that surrounds an area 25. Polygon with 8 sides 26. Figure formed by two rays sharing a common endpoint

Down 1. A quadrilateral whose four sides all have the same length 3. A line passing through one vertex of a triangle and perpendicular to the opposite side 4. Divides the angle into two equal angles 5. A polygon with four 'sides' or edges 6. Is part of a line which is finite in one direction (Half-line) 8. Two lines in a plane that do not intersect or meet 15. All sides of the same length 16. Is a quadrilateral with two disjoint pairs of congruent adjacent sides 17. It has four equal sides and four equal angles 18. Is any five-sided polygon 20. Part of a line that is bounded by two end points 22. An entity that has a location in space or on a plane, but has no extent