High School Math based on the topics required for the Regents Exam conducted by NYSED.
More Lessons for the High School Regents Exam,
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The following table gives some terms and vocabulary used in geometry. Scroll down the page for more examples, explanations and solution.
Point, Line and Plane:
In Geometry, we have several fundamental concepts: point, line and plane. From these three basic terms, all other terms in Geometry can be defined.
In Geometry, we define a point
as a location and no size. A line
is defined as something that extends infinitely in either direction but has no width and is one dimensional while a plane
extends infinitely in two dimensions.
is an exact location in space. They are shown as dots in a plane in 2-dimensions or dots in space in 3-dimensions. It is labeled with capital letters. It does not take up any space.
is a geometric figure that consists of an infinite number of points lined up straight that extends in both directions forever. A line is identified by a lower case letter or by two points that the line passes through. We can draw exactly one line through two points. All points on the same line are called collinear
. Two lines are either parallel
or they will intersect at a point. A line segment
is part of a line with two end points.
starts from one end point and extends in one direction forvever.
is a flat 2-dimensional surface. It can be identified by 3 points in the plane. There are infinite number of lines in a plane. The intersection of two planes is a line. Coplanar
points are all in one plane.
Points, Lines, and Planes
Point, Line, Plane
This video explains and demonstrates the fundamental concepts (undefined terms) of geometry: point, line, plane.
Geometry - Points, Lines, Planes, Space Notation - Part 1 of 2
Geometry - Points, Lines, Planes, Space Notation - Part 2 of 2
A song to help you remember Line, Ray, Line Segment, Plane, Point
In this lesson, students learn the definitions of a point, a line, a plane, and space, as well as the symbols that are used in Geometry to represent each figure.
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