Math Crossword

8. a ratio between two corresponding sides of similar shapes
9. a surface of which one end or side is at a higher level than another; a rising or falling surface
11. a plane figure with three straight sides and three angles
12. numbers added together
16. The measure of the 'opening' between these two rays
17. the movement of an object that leaves at least one point unchanged
18. an image seen in a mirror or shiny surface
19. a thorough or dramatic change in form or appearance.
20. in a direction opposite to the direction in which the hands of a clock move

1. in the direction in which the hands of a clock turn
2. the length of a closed boundary that encompasses, surrounds, or outlines either a two-dimensional shape or a one-dimensional line
3. The space enclosed by the boundary of a plane figure
4. any characteristic, number, or quantity that can be measured or counted
5. a complex whole; a set of things working together as a mechanism or interconnecting network
6. the original appearance of a figure in a transformation operation
7. the process of opening up a narrow body part in order to restore its function or perform a medical procedure on it
10. a single, whole part of something
13. a set of numbers that contain operations and can contain a variable
14. a line
15. the determination of the relative position of something or someone