# snow day-math1.txt

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1. Point
One of the basic undefined terms of geometry. No length
2. Ray
a ray begins at a point and goes on forever in one direction
3. Angle
the union of two distinct rays that have a common end point
4. Vertex
the common end point of an angle
5. Plane
One of the basic undefined terms of geometry. Goes on forever in all directions; two-dimensional and flat.
6. Line
One of the basic undefined terms of geometry. A set of points whose length goes on forever in two opposite directions.
7. Line segment
the part of a line between two points on the line
8. Intersecting lines
two lines meet at a point. That point is the only point that belongs to both lines
9. Intersection
all the points 2 figures have in common
10. Parallel lines
two lines in a plane that do not intersect
11. End points
the points at the end of a line segment
12. Compass
instrument used to draw circles. It has two tips � center and pencil.
13. Bisector
divides a segment or angle into two equal parts
14. Perpendicular lines
two lines that intersect to form four right angles
15. Circle
all points in a plane at a constant distance