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Geometry Ess. Vocab
Term | Definition |
---|---|
Point | A point has no dimension. A dot represents a point. |
Line | A line has one dimension. It is represented by a line with two arrowheads, but it extends without end. |
Plane | A plane has two dimensions. It is represented by a shape that looks like a floor or a wall, but it extends without end. |
Segment | The line segment AB or segment AB consists of the endpoint A and B and all points on Line AB that are between A and B. |
Ray | The ray AB consists of the endpoint A and all points on Line AB that lie on the same side of A as B. |
Intersection | Two or more geometric figures intersect when they have one or more points in common. The intersection of the figures is the set of points the figures have in common. |
Collinear Points | Three points are collinear if and only if they lie on the same line. |
Coplanar Points | Three points are coplanar if and only if they lie in the same plane. |
Opposite Rays | Ray CA and Ray CB are opposite rays if and only if Point C lies on Line AB between A and B. |