Line-Segment, Ray and Line
Definition of in Line-segment, ray and line geometry:
A line segment is a fixed part of a line. It has two end
points. It is named by the end points. In the figure given below end points are
A and B. So, the line segment is called AB. A line segment is denoted as \(\overline{AB}\).
The part of a line is called a line-segment
as shown below.
Line segment \(\overline{AB}\)
|
Line segment \(\overline{AB}\)
|
Only one line can be drawn passing through
any two points but a number of lines can be drawn through a point.
Line AB
|
Lines passing through a point O
|
Line segment CD
|
|
Ray: We know about sun-rays. A sun-ray
starts from the sun and goes on a direction up to endless space. Similarly a
geometrical ray is considered a special kind of line which starts from a fixed
point and goes to any distance to the other direction of the starting point.
The name of a ray is given with two capital
letters. One letter is written at the starting point of the ray and the other
letter is written near the arrow end as AB and LM.
A line, line segment and ray all are called
one dimensional (1-D) figures as they have only length.
In short, a ray is a portion of line. It has one end point. A ray can
be extended in any one direction endlessly. We name the given ray as \(\underset{AB}{\rightarrow}\). The first letter
shows the end point. The Sun light is an example of the ray.
Distinction between line-segment, ray and line:
Line-segment
1. It has two end points.
2. The length of a line-segment is definite. So, it can be measured.
3. The symbol of a line-segment is _____
|
Ray
1. Ray has one starting point and another near the arrowhead.
2. It has a starting point but no other end point. So, its length cannot be measured.
3. The symbol of a ray is →
|
Line
1. There are no end points in a line.
2. There are no end points. So, length of a line cannot be measured.
3. The symbol of a line is ↔
|
These explanations on line-segment, ray and
line will help the kids to understand the different fundamental element of
geometry and their distinction.
You might like these
What are the different types of lines? There are two different kinds of lines. (i) Straight line and (ii) Curved line. There are three different types of straight lines. (i) Horizontal lines, (ii) Vertical lines and (iii) Oblique or slanting lines.
In third grade geometry activities kids will learn about the basic shapes (solids). We know, about some of the geometrical shapes like cuboid, cube, cylinder, cone, sphere, triangular prism, etc.
We can measure objects by comparing them with other objects like clips, ribbons, pencils or using our body parts for example handspan, foot, cubit and stride. These are non-standard units of length.
Practice the math worksheet on third grade geometrical shapes. The questions will help the students to get prepared for the third grade geometry test. 1. Name the types of surfaces that you know. 2. What types of surfaces do the following objects have?
We can estimate some lengths and distances using approximate value for measurements. For example, one meter is approximately the length from shoulder to fingertips of an adult. A meter is also approximately the distance of one large step or jump. You must have seen the cloth
In 3rd Grade Geometrical Shape Worksheet we will answer the different type of questions on straight line, curve line, plane shape, solid shapes, drawing solids on a lat surface, and tangrams.
A map is a drawing that gives us information about the place. For example, a map of a bedroom might show where the bed,, dressing table, cupboards are. A map of a city or a locality shows streets, highways, schools or landmark etc.
Tangram is a traditional Chinese geometrical puzzle with 7 pieces (1 parallelogram, 1 square and 5 triangles) that can be arranged to match any particular design. In the given figure, it consists of one parallelogram (6) one square (4) and five triangles (1. 2, 3,5 and 7)
We can draw 3D shape like cube, cuboid, on a dotted sheet. There are two different sheets – ordinary sheet and isometric sheet. Isometric sheet is a special paper with dots at equal distance, which help us to draw 3D shapes.
Practice the third grade math worksheet on point, lines, line-segment and ray in geometry. The questions will help the kids to understand the basic concept of point in geometry; lines
Definition of points, lines and shapes in geometry: Point: A point is the fundamental element of geometry. If we put the tip of a pencil on a paper and press it lightly,
Related
Concepts
●
Basic Shapes
●
Surfaces of the
Solids
●
Common Solid Figures
●
Points, Lines and
Shapes
●
Types of Lines
●
Geometrical Design
and Models
3rd Grade Math Lessons
From Line-Segment Ray and Line to HOME PAGE
Didn't find what you were looking for? Or want to know more information
about Math Only Math.
Use this Google Search to find what you need.
Share this page:
What’s this?
|
|
New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.