Measuring Line Segments Video Lecture | Mathematics & Pedagogy Paper 2 for CTET & TET Exams - CTET & State TET

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understanding elementary shapes part 2
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other than the line segment so what is a
line segment
when image sensing is line segment so it
is not aligning but part of a line of
segments of a line
so part of a line respect endpoint now
this is important because this is what
distinguishes a line segment from a line
so how do i define a straight line a
straight line would be nothing but a
combination of points many points joined
together like this maybe if you put
several points one after another like
this you would end up getting a straight
line now a train line when we talk about
line it means that it can extend
infinitely in both directions so this is
this side and this side each one
extending so there are no endpoint but
when we talk about the line segment we
talk about only a certain portion of the
line this fixed end points when you look
at ad a B is a line segment because last
it's ten points a and B so this a B is a
part of the straight line that you see
on the screen so that's a line segment
now have you ever played the tug of war
sometime or the other or if you are ever
seeing others playing dub of what so
what happens you have a rope you have
two teams so there is team L you have a
team B so few people on one side few
people or team b and go to then stretch
the roads now we will you know kind of
pushes it pushes it with more force the
entire dope comes to their side and they
are the winners so that's how the game
works so here you are seeing in the
portion of the goal which is Co held in
between what is this this could be an
example of a line segment it is a part
of the line right so in this fashion you
can find out many examples of line
segments in things around you so that's
a line segment now some of the examples
in drama day to day line could be a
ruler so any
the ruler and edge of the ruler is
nothing but a line segment so it because
it has a fixed length because it has
fixed end point when you look at the
lines in your notebook they are also
line segment have you ever observed us
you take a sheet of paper folded and
again drink try to bring it back what
happens you tend to develop these kind
of lines so these are also nothing but
line segments to their of fixed length
look at another look at the Rope we're
all examples of line segments now the
next challenge is how do we measure line
segment like there should be multiple
line segments so how do we distinguish
line segments from each other by
measuring them so how do we measure line
segments let's look at this example
let's say that this is your home and
this is your school and there is a
straight road back sanic your school
into your home okay now if I want to
find out the distance between your
school and your home what do I need to
do I need to find out the length of this
line segment because it is a straight
line segment right if I am able to find
out this length I should be able to find
out the distance between your home and
your school let's look at this one so
the distance between your home and maybe
the nearby market is this much right so
if I want to compare that whether your
school is more far from your house or is
the shop or market more far from your
house so how do I find that
so for that I need to measure the length
of this distance I also need to measure
the length of this distance and then I
need to compare the two to find out
which is bigger so what we are left with
is this that is you are left with one
line segment let us call this line
segment as baby
another line segment let's call this a
speedy so we have to compare the length
of a B and C so here comes the need to
measure lengths of length length so this
is why we need to measure their length
so how do we majored in it using a ruler
that is one very simple approach to do
that you take a ruler and then try to
measure the length so how do we measure
the length we make sure that by
measuring the length one end of the line
segment should coincide with the zero
one of the rulers from variable the
marking starts that point and the end
point of the line segment they should
exactly coincide with each other and
then you focus on the other endpoint of
the line and see and read it look at its
reading so here the building is
approximately 13 centimeters now in a
similar way you can find out the length
of the other line segment and hearing
people almost 19.5 so you can see that
CD in this case is greater than a B so
you can see that the distance of the
market is more than the distance of the
school from home thank you please visit
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