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Across 2. Two angles that add up to 90 degrees. 4. A polygon with eight sides 6. An angle that measures exactly 90 degrees. 12. A polygon with four sides. Squares, rectangles and parallelograms are examples of these. 13. Two points determine a _________. It extends in two directions without ending. 15. Two angles that add up to 180 degrees. 16. The _________ of a rectangular box= length x height x width. 18. An angle that measures less than 90 degrees. 21. An instrument used to measure angles. 23. A triangle with at least two sides congruent. 26. An angle that measures 180 degrees. 27. The distance around an object 30. A _____ can be determined by three points. It extends in all directions. Common examples would be a floor, wall or table top. 31. A figure formed by two rays with a common endpoint.

Down 1. If two objects have the same shape and size, they are __________. 3. Two lines that meet to form right angles. 5. The ______ of a triangle =1/2( base x height) 7. The two points at either end of a segment. 8. If two objects are the same distance from a given point, they are _________. 9. A geometric figure with an endpoint at one end and an arrow at the other. 10. __________ points are all in one line. 11. The study of the branch of mathematics that deals with the deduction of the properties, measurement, and relationships of points, lines, angles, and figures in space. 14. Two triangles that have all corresponding sides congruent. 17. The point that divides a segment into two conguent parts. 19. Two lines __________ at the same point. 20. Two lines in the same plane that never intersect. 22. A ______ has four congruent sides and four congruent angles. 24. An angle that measures more than 90 degrees. 25. The sum of the angles of a _________ is 180 degrees. 26. Two points on a line and all the points between them. 28. The set of all points. 29. The simplest figure in geometry, represented by a dot.