Examples: Measuring Angles Video Lecture | Mathematics (Maths) Class 6

hello friends this video on
understanding elementary shapes but 11
is brought to you by exam for calm no
more fearsome exam to numberphile which
angle has a large measure first estimate
and 10 measures now even before you beat
a tour protractor and at that machine
the actual measure edges when looking at
the angle what do you think which will
have a larger vision now measurement of
an angle is all about the inclination of
the two reels so far even if you see
that the inclination of the two days is
lesser right
but in angle D the inclination between
the two leaves raised is more so we are
expecting angle B to be larger than that
of angle a now let's make use of a
protractor and only little protractor we
can tell the exact measure so I hope you
remember the two important points when
measuring with the protractor first
point the sense is the midpoint of the
straight end of the projectors should
coincide with the vertex of the angles
perfect
the second point is that the straight
edge of the protractor should lie along
one of the arms of the angle that is
also positive and from reading you class
the measurement from the zero so this is
the zero nothing here in this protector
the other two scales one skein is zero
starting from this side and other
skaters video starting from that side
why because in this case we want to
measure this angle so we are actually
coincide rate the straight edge of the
protector with this arm of the angle so
we need to start measuring the angle
from this arm so you remember why number
three that the zero mark on the
professor should lie on this arm of the
angle this zero mark is line here so we
will start measuring from here so we see
that this line comes at 40 so that means
the measurement of angle is 40 degrees
so measure of angle E is fertility now
let's make an angle me again this
this sentence coinciding with the
voltage the straight edge residing with
one of the arms now in this case when
you see the measurement you see the
measurement is slightly more than 55 and
slightly less than 70 now here it since
we are just showing into animation to
Nancy doing maybe to come approximately
70 let's assume that a measurement is
approximately 10 so which has which is
more so we see that measurement of angle
B is greater than measurement of angle E
a so whatever we had get was right
question number 6 find the angle measure
between the hands of the clock in each
figure ok let's first focus on the first
failure so here we will have to find out
the measure of this angle let's place
the protractor correctly such that the
midpoint of the straight of the straight
edge coincides with the vertex and also
the treat edge should coincide with one
of the arms of the angle so where is
zero this is zero because zero coincides
with this straight edge of the
protractor ok now let's see there is
this the other arm to the other arm
corresponds to 30 B so that means the
measure of this angle is 30 degree let's
move on to the next one where this is a
straight line so that is the straight
angle if you look at a you see both the
arms of the angles are coinciding with
the straight edge of the protractor this
very clearly which very clearly tells us
that this angle is nothing but
180-degree question of the current major
and classifying each angle so we have
given this table so we have to find out
the measurement of each of these angles
and also what type of antenna stood
whether it is a cute angle of design
angle about Adam angle the first one is
angle AOB so this is angle a only so
again we will place the protractor base
point of the protractor for you siding
with the vertex of the angle so let me
measure this angle how much is this
distance 40 degrees so this angle is 40
degrees so extension is 40 degree can
you tell me what type of angle is this
its value is less than 90 degree - this
is acute angle next one's angles a OT so
even for angle AOC we will place the
protractor in the similar way and here
if you look at and in a OCE you see
distance and them 88 this total angle so
this corresponds to 125 degrees so
therefore angle a or C is 125 50 so what
type of angle is this is obvious because
it is greater than 90 but less than 180
third one is angle B or C so B or C
would be this angle so we have to place
the protesters in this fashion such that
it coincides with the arm OB and the big
point should coincide with the point O
so is this we see that this angle cut is
between 80 and 90 so this point
corresponds to 85 degrees nice so this
and then B or C is 85 V so what cut type
of animal tips this is also less than 90
degree so this is also acute angle so in
a similar fashion I hope that you can
find out the value of energy rows video
a and B movie so that is left as an
exercise for you to take heat placing
the protractor and trying to find their
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