Geometry

4. 90 degrees
7. the length of the line through the center that touches two points on the edge of the circle
12. The line that divides something into two equal parts
13. make some changes in any given geometric shape
14. two lines in the same plane that are at equal distance from each other and never meet
15. a closed, two-dimensional shape which has four straight sides.

1. moves every point of a figure or space by the same distance in a given direction.
2. an object moves but maintains its shape and size
3. same shape and size
4. a mirror image of the shape.
5. a line that passes through two lines in the same plane at two distinct points
6. a motion of a certain space that preserves at least one point.
8. middle point of a line segment
9. the quality of being made up of exactly similar parts facing each other or around an axis
10. When two or more lines cross each other in a plane
11. the point at which the perpendicular bisectors of the sides of a triangle intersect