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Across 1. parts between two or more objects that are matched 6. number of cubic units needed to fill a given space 9. 3-D figure with two parallel, congruent circular bases connected by a curved lateral surface 10. line segment that passes through the center of a circle and has endpoints on the circle 11. side of polygon 13. number of square units needed to cover a surface 18. equation that states that two ratios are equivalent 19. comparison of two quantities by division 20. distance around a circle 21. line segment with one endpoint at the center of the circle and endpoint on the circle

Down 2. figures with same shape but not necessarily the same size 3. technique of using similar figures and proportions to find a measure 4. in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs 5. drawings used to make a reduction or enlargement of an object 7. breadth or distance across 8. perpendicular distance from base to opposite side 9. rectangular prism with six congruent square faces 12. sum of areas of the faces of a 3-D figure 14. closed plane figure formed by three or more line segments that intersect only at their endpoints 15. distance around a polygon 16. long dimension of any object 17. ratio of circumference of a circle to the length of its diameter