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Across 1. a polygon with three angles and three sides 5. a solid figure where all the faces are triangles 8. having three dimensions, length, width, and height 13. a group of numbers, symbols, and variables that express an operation 15. the temperature at which water freezes, 32 degrees F or 0 degrees C 16. an orderly arrangement of objects in a rectangular shape with rows and columns 17. the length between two points 18. plural form of vertex

Down 2. a decimal that does not end; goes on infinitely (0.33333...) 3. two angles whose measures have a sum of 180 degrees 4. when a figure slides in any direction 6. the temperature at which a water boils, 212 degrees F or 100 degrees C 7. a fraction put in terms of tenths, hundredths, thousandths, ... 8. a solid with two faces that are triangles 9. the bottom number in a fraction 10. having two dimensions, length and width (flat object on paper) 11. a rectangle with all four sides the same length 12. the point where two lines meet to form an angle (a corner) 14. having the same size and shape