Class 6 Exam > Class 6 Videos > Construction of a 120 Degree Angle
Construction of a 120 Degree Angle Video Lecture - Class 6
FAQs on Construction of a 120 Degree Angle Video Lecture - Class 6
| 1. How do I construct a 120 degree angle? |  |
Ans. To construct a 120 degree angle, follow these steps:
1. Draw a line segment using a ruler.
2. Place the compass at one end of the line segment and draw an arc that intersects the line.
3. Without changing the compass width, place the compass at the intersection point and draw another arc that intersects the first arc.
4. Label the intersection point of the two arcs as point A.
5. Draw a line segment from the starting point to point A.
6. Label the angle formed as ∠BAC, which measures 120 degrees.
| 2. Can I construct a 120 degree angle without using a protractor? | |
Ans. Yes, you can construct a 120 degree angle without using a protractor. By using a compass and a ruler, you can follow the steps mentioned in the previous answer to construct a 120 degree angle accurately.
| 3. What is the measure of each angle in an equilateral triangle? | |
Ans. In an equilateral triangle, each angle measures 60 degrees. This is because all three sides of an equilateral triangle are equal, and the sum of all internal angles of a triangle is always 180 degrees. Therefore, each angle in an equilateral triangle is 180 degrees divided by 3, which equals 60 degrees.
| 4. Can I construct a 120 degree angle using only a ruler? | |
Ans. No, you cannot construct a 120 degree angle using only a ruler. A ruler alone does not allow you to measure angles accurately. You would need a compass in addition to a ruler to construct a 120 degree angle accurately.
| 5. How can I measure a 120 degree angle using a protractor? | |
Ans. To measure a 120 degree angle using a protractor, follow these steps:
1. Place the midpoint of the protractor's base on the vertex of the angle.
2. Align one of the angle's arms (rays) with the protractor's zero-degree line.
3. Read the degree measurement where the other angle arm intersects the protractor scale.
4. If the measurement reads 120 degrees, then the angle is 120 degrees. If not, adjust the position of the protractor until the correct measurement is obtained.
Text Transcript from Video
hello friends this video unpractical de
mettre part 11 is brought to you by exam
fear calm no more fear from exam
now how about 120 degrees now you would
see that everything you can draw a lot
of other angle measures using how you
did for 60 degree so using the same
concept you'd be able to draw many other
angles now can you think of any way by
which six 120 degree is related to sixty
degree yes 120 degree is twice of sixty
degree that's simple
so 120 is nothing but two times 60
degree so we will make use of this fact
so let's see what do we do so here also
first we draw a sixty degree like how we
did in the previous line so take a
compass consider this point let's call
this point as oh so this point is going
to be the vertex of the angle that will
get formed later
so with Oh has the sent you'll draw an
arc so this arc would intersect this
line at some point let's call this point
as eight now with a as the radius a has
the center and the same radius as you
had drawn before you draw another arc so
you would see that these two arcs they
intersect at a point
now when you join this point this angle
is your 60 degree so this is how we had
drawn 60 degree but now I am interested
in 120 degree so 120 degree means one
more 60 degree so what are we going to
do now here is this is 60 now we place
the compass at this point now even now
we have not changed the orientation of
the compass so if this was odd we ensure
that even this is odd so with the same
orientation we draw another arc and we
see that this arc intersect the existing
arc at a particular point and what we do
we join this point with the vertex and
this angle is nothing but 120 degree
that's because this was 60 degree as we
have proved in the previous slide here
we have drawn another R in this fashion
so as per what
we learned in the previous slide this
was odd this was odd and this was also I
write so that we had proved in the
previous life
now here we pipe with the same
measurement of the compass we had drawn
this arc also which means that this is
also I and this is anyways odd because
this is the radius of the same arc no
this big arc is part of the same circle
so if this is odd this is also art so
all of these are art so that means this
triangle is also any Queen activate
angle that means this angle is also 60
degree so together this complete angle
is how much this is 120 degree so this
is how we draw a 120 degrees thank you
please visit exam fee or come for free
quality education you can learn with a
simple four-step learning process
wherein you can watch video lessons you
can ask your questions you can refer
notes and you can take a free online
test we have content for class 6 to 12
on physics chemistry mathematics and
biology along with practical videos so
please subscribe to our channel for
daily updates thank you
mettre part 11 is brought to you by exam
fear calm no more fear from exam
now how about 120 degrees now you would
see that everything you can draw a lot
of other angle measures using how you
did for 60 degree so using the same
concept you'd be able to draw many other
angles now can you think of any way by
which six 120 degree is related to sixty
degree yes 120 degree is twice of sixty
degree that's simple
so 120 is nothing but two times 60
degree so we will make use of this fact
so let's see what do we do so here also
first we draw a sixty degree like how we
did in the previous line so take a
compass consider this point let's call
this point as oh so this point is going
to be the vertex of the angle that will
get formed later
so with Oh has the sent you'll draw an
arc so this arc would intersect this
line at some point let's call this point
as eight now with a as the radius a has
the center and the same radius as you
had drawn before you draw another arc so
you would see that these two arcs they
intersect at a point
now when you join this point this angle
is your 60 degree so this is how we had
drawn 60 degree but now I am interested
in 120 degree so 120 degree means one
more 60 degree so what are we going to
do now here is this is 60 now we place
the compass at this point now even now
we have not changed the orientation of
the compass so if this was odd we ensure
that even this is odd so with the same
orientation we draw another arc and we
see that this arc intersect the existing
arc at a particular point and what we do
we join this point with the vertex and
this angle is nothing but 120 degree
that's because this was 60 degree as we
have proved in the previous slide here
we have drawn another R in this fashion
so as per what
we learned in the previous slide this
was odd this was odd and this was also I
write so that we had proved in the
previous life
now here we pipe with the same
measurement of the compass we had drawn
this arc also which means that this is
also I and this is anyways odd because
this is the radius of the same arc no
this big arc is part of the same circle
so if this is odd this is also art so
all of these are art so that means this
triangle is also any Queen activate
angle that means this angle is also 60
degree so together this complete angle
is how much this is 120 degree so this
is how we draw a 120 degrees thank you
please visit exam fee or come for free
quality education you can learn with a
simple four-step learning process
wherein you can watch video lessons you
can ask your questions you can refer
notes and you can take a free online
test we have content for class 6 to 12
on physics chemistry mathematics and
biology along with practical videos so
please subscribe to our channel for
daily updates thank you
About this Video
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Nov 22, 2024 Last updated |
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