Geometry

1. lines two or more lines that are always the same distance apart and never intersect
3. A flat surface extending in all directions
4. the property created by the space between two objects
6. segment a part of a straight line that is bounded by two distinct end points
7. the perimeter of a circle
9. a shape consisting of all points in a plane that are at a given distance from a given point, the centre.
11. any of a set of straight lines passing through one point.
12. the figure formed by three segments joining 3 non-collinear points
15. a figure which is formed by two rays or lines that shares a common endpoint
16. A line or ray that divides an angle in half
17. A closed figure made up of at least 3 line segments that do not cross
18. Points that are on the same line

1. a four-sided plane rectilinear figure with opposite sides parallel.
2. lines Lines that are at right angles (90 degrees) to each other.
5. angles with the exact same measure
8. a measure for arcs and angles
10. angle An angle that measures more than 90 degrees but less than 180 degrees
13. a point, line, or curve common to two or more objects
14. angle an angle less than 90 degrees
17. a location represented by a dot