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Drawing An Angle using Protractor Video Lecture - Class 6
FAQs on Drawing An Angle using Protractor Video Lecture - Class 6
| 1. What is a protractor? |  |
Ans. A protractor is a geometric tool used to measure and draw angles. It is a semi-circular or circular device with degree markings that helps in accurately measuring angles.
| 2. How do you use a protractor to draw an angle? | |
Ans. To draw an angle using a protractor, follow these steps:
1. Place the midpoint of the protractor at the vertex of the angle.
2. Align one side of the angle with the baseline of the protractor.
3. Read the degree measurement where the other side of the angle intersects the protractor scale.
4. Use a ruler to draw the measured angle using the vertex as a starting point.
| 3. What are the different types of angles? | |
Ans. There are several types of angles, including:
- Acute angle: An angle that measures less than 90 degrees.
- Right angle: An angle that measures exactly 90 degrees.
- Obtuse angle: An angle that measures greater than 90 degrees but less than 180 degrees.
- Straight angle: An angle that measures exactly 180 degrees.
- Reflex angle: An angle that measures greater than 180 degrees but less than 360 degrees.
| 4. Can a protractor be used to measure reflex angles? | |
Ans. Yes, a protractor can be used to measure reflex angles. When measuring a reflex angle, start from the side of the angle that is closest to 180 degrees on the protractor scale. Continue measuring along the scale until you reach the other side of the angle. The sum of the two measurements will give you the measurement of the reflex angle.
| 5. Is it possible to draw an angle greater than 180 degrees using a protractor? | |
Ans. No, a protractor is typically designed to measure angles up to 180 degrees. However, it is still possible to draw an angle greater than 180 degrees using a protractor by following the same steps as drawing a reflex angle.
Text Transcript from Video
We're asked to construct
a 10 degree angle.
So we have this
little angle tool
here that we can use
to construct an angle.
So just like that.
And then they give
us a protractor
to actually measure the angle.
So let's set it up.
Let's put the protractor here.
Let's put the
vertex of the angle
at the center of the protractor,
in other words, center
the protractor at the
center of the vertex.
Looks like the protractor's
a little bit easier
to manipulate.
So let's do that there.
Now let's put one of the
rays here at 0 degrees.
And now I'm going to put
the other ray at 10 degrees.
And it looks like I am done.
I have constructed
a 10 degree angle.
And you want to be
careful here when
you use this tool because
the angle in question--
let me move the protractor show
you what I'm talking about--
that this right over here is the
angle that we're talking about.
If I'd switched these two rays,
the way the tool is set up,
it might have
interpreted the angle
as this outer angle
right over here.
So be careful to look at which
angle we're actually measuring.
But this looks like I
did the 10 degree angle.
So let me check my answer.
And just to be clear
what I'm talking about.
If you did the 10
degree angle like this,
then it definitely would
have marked it wrong
even though the interior angle
right over here or this angle
right here might be 10 degrees.
The way the tool is set up,
you see from this circle,
that it thinks that you're
looking at this outer angle.
So it's important to
make sure, at least
for the sake of this
exercise, that the system,
that the computer
program knows which
angle you're going
to talk about.
Let's do one more of these.
155 degree angle.
And this one's
interesting because this
is an obtuse angle.
So once again, let
us put the protractor
at the vertex of the angle.
So just like that.
And now that seems pretty good.
Now let's take one ray
and put it at 0 degrees,
and then let's take the
other one and put it at 155.
So once again, 10, 20,
30, 40, 50, 60, 70, 80,
90-- that gets us
to a right angle.
Then we'll start getting into
obtuse angles, 100, 110, 120,
130, 140, 150.
And just to make
sure that blue arc
is measuring this angle right
over here, not the outer one.
And let me move the
protractor out of the way
so we can get a good look at it.
And we got it wrong.
So let's see what we--
oh, 155 degree angle, not
150 degree angle.
Let me fix that.
155 degree angle.
Now we got it right.
a 10 degree angle.
So we have this
little angle tool
here that we can use
to construct an angle.
So just like that.
And then they give
us a protractor
to actually measure the angle.
So let's set it up.
Let's put the protractor here.
Let's put the
vertex of the angle
at the center of the protractor,
in other words, center
the protractor at the
center of the vertex.
Looks like the protractor's
a little bit easier
to manipulate.
So let's do that there.
Now let's put one of the
rays here at 0 degrees.
And now I'm going to put
the other ray at 10 degrees.
And it looks like I am done.
I have constructed
a 10 degree angle.
And you want to be
careful here when
you use this tool because
the angle in question--
let me move the protractor show
you what I'm talking about--
that this right over here is the
angle that we're talking about.
If I'd switched these two rays,
the way the tool is set up,
it might have
interpreted the angle
as this outer angle
right over here.
So be careful to look at which
angle we're actually measuring.
But this looks like I
did the 10 degree angle.
So let me check my answer.
And just to be clear
what I'm talking about.
If you did the 10
degree angle like this,
then it definitely would
have marked it wrong
even though the interior angle
right over here or this angle
right here might be 10 degrees.
The way the tool is set up,
you see from this circle,
that it thinks that you're
looking at this outer angle.
So it's important to
make sure, at least
for the sake of this
exercise, that the system,
that the computer
program knows which
angle you're going
to talk about.
Let's do one more of these.
155 degree angle.
And this one's
interesting because this
is an obtuse angle.
So once again, let
us put the protractor
at the vertex of the angle.
So just like that.
And now that seems pretty good.
Now let's take one ray
and put it at 0 degrees,
and then let's take the
other one and put it at 155.
So once again, 10, 20,
30, 40, 50, 60, 70, 80,
90-- that gets us
to a right angle.
Then we'll start getting into
obtuse angles, 100, 110, 120,
130, 140, 150.
And just to make
sure that blue arc
is measuring this angle right
over here, not the outer one.
And let me move the
protractor out of the way
so we can get a good look at it.
And we got it wrong.
So let's see what we--
oh, 155 degree angle, not
150 degree angle.
Let me fix that.
155 degree angle.
Now we got it right.
About this Video
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Nov 16, 2024 Last updated |
Drawing An Angle using Protractor for Class 62024 is part of Class 6 preparation. The notes and questions for Drawing An Angle using Protractor
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