Geometry

7. moves a shape left or right and/or up or down.
10. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
11. at an angle of 90° to a given line, plane, or surface.
14. a plane figure with four equal straight sides and four right angles.
16. a part of the circumference of a circle or other curve.
17. how likely something is to happen.
19. the continuous line forming the boundary of a closed geometric figure.
20. a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).

1. the longest side of a right triangle, opposite the right angle.
2. the action of rotating around an axis or center.
3. (of lines, planes, surfaces, or objects) side by side and having the same distance continuously between them.
4. the extent or measurement of a surface or piece of land.
5. the exact middle point.
6. the angle subtended by an arc of a circle at the center of a circle.
8. a four-sided figure.
9. a straight line from the center to the circumference of a circle or sphere.
12. a theorem attributed to Pythagoras that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
13. a triangle with a right angle.
15. the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.
18. divide (a line, angle, shape, etc.) into two equal parts.