Triangles and Polygons

Triangles and other polygons play a role in our lives everyday. We will be studying these shapes in class over the next couple of weeks. Try this crossword puzzle without any reference materials first to test your background knowledge. If you get stuck, use your textbook, computer or math dictionary to help you. Good luck! (** Note: If your answer is more than one word, do not put any spaces between words when you fill in the puzzle.)

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Across

1. the sum total of the three angles of any triangle (2 words)

10. a triangle with at least two congruent sides (2 words)

12. a triangle with no congruent sides (2 words)

15. a parallelogram with four right angles

17. a parallelogram with congruent sides and congruent angles

18. figures that have the same size and shape

19. a polygon with six sides

20. a simple closed figure formed by three or more line segments

Down

2. a triangle with three congruent sides (2 words)

3. a polygon with four sides

4. a quadrilateral with 2 pairs of parallel sides

5. a polygon with three sides

6. a triangle with one right angle (2 words)

7. parallelogram with all congruent sides

8. a triangle with three angles that are less than 90 degrees (2 words)

9. a polygon with ten sides

11. a triangle with one angle greater than 90 degrees (2 words)

13. quadrilateral with exactly one pair of parallel sides

14. a polygon with five sides

16. a polygon with eight sides

Use the "Printable HTML" button to get a clean page, in either HTML or PDF, that you can use your browser's print button to print. This page won't have buttons or ads, just your puzzle. The PDF format allows the web site to know how large a printer page is, and the fonts are scaled to fill the page. The PDF takes awhile to generate. Don't panic!