Yes, you can use Math Crossword Puzzles to reinforce important math skills. This one proves it! Puzzle solvers must know the terms and definitions for one of our favorite branches of mathematics -- geometry.

At the bottom of this page, you'll find links to some simpler math-related puzzles on our site.

**ACROSS**

1. A four-sided polygon

4. A closed plane figure having all points an equal distance from the center

6. An angle that measures less than 90 degrees

9. Lines that share a common point are ___ lines.

10. An eight-sided polygon

11. Two lines in a plane that never intersect are ___ lines.

12. The common endpoint of two rays

13. An angle that measures 90 degrees

15. Figures that have the same shape but not necessarily the same size are said to be ___.

17. The number of square units needed to cover a region or figure

19. A figure formed by two rays with the same endpoint

20. A five-sided polygon

24. A ten-sided polygon

25. A line that divides a figure into two matching parts is a line of ___.

27. Lines that intersect and form right angles are ___ lines.

28. A closed plane figure with any number of sides

29. A three-sided polygon

**DOWN**

2. A parallelogram with four right angles

3. The distance around a figure

5. A straight path with no endpoints; it goes on forever in both directions

7. The distance around a circle

8. A subset of a line which contains two endpoints

11. A quadrilateral in which the opposite sides are parallel and congruent

14. A six-sided polygon

16. A flat surface that goes on and on in all directions

18. A rectangle with four equal sides

21. A line that divides an angle in half

22. An angle that measures more than 90 degrees

23. Figures that have the same size and shape are ___.

26. A part of a line that has one endpoint and goes on forever in one direction

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