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What are the steps to use to measure an angle using a protractor?
Wiki User
∙ 10y ago
To measure an acute or obtuse angle:
- Put the cross-hairs at the centre of the base line of the protractor on the point of the angle;
- Align one zero on one arm of the angle (keeping the cross-hairs in place) with the circular part of the protractor over the other arm;
- Read off the angle of the other arm with the scale that starts at 0o on the first arm.
To measure a reflex angle:
- Measure the angle (of the small angle) between the arms as above;
- Subtract the found angle from 360o.
Note:
The base line of the protractor is the straight line marked on the protractor that runs from 0o to 180o; half way along this line will be a perpendicular line towards the 90o mark which may touch or cross the base line - this point is the "cross-hairs".
To draw a given angle:
To draw an acute or obtuse angle:
- Draw one arm of the angle;
- Put the cross-hairs at the centre of the base line of the protractor on the end of the arm that forms the point of the angle;
- Align one zero on the drawn arm of the angle (keeping the cross-hairs in place) with the circular part of the protractor where the other arm should go;
- Mark the angle of the other arm with the scale that starts at 0o on the first arm.
- Draw in the other arm;
- Optional: mark the angle (between the lines) with a small arc near the point.
To draw a reflex angle:
- Subtract the angle from 360o
- Draw as above; except the angle is marked with a small arc round the outside of the arms (instead of between them).
Wiki User
∙ 10y ago
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How can i find a measure of an angle?
By using a protractor or using trigonometry
Do you have to measure the sides while measuring an angle?
When measuring an angle you have to measure the sides using a protractor.
How do you work out an angle?
With the information given in the question, the only answer that I can offer is that you measure it, using a protractor.
What is the measure of an angle using a protractor?
A protractor is a tool that may be used to measure an angle. The measure of the angle exists irrespective of the tool that is used to measure it. In the same way that you have a height and your height is a [mainly] fixed amount and whether it is measured with a rule or a tape measure or a laser range finder does not affect your height!
How do you measure the contact angle?
There are many ways to measure a contact angle, but the simplest way is to use a goniometer. The image of the droplet is taken with a high resolution camera; the angle can then be measured using a protractor.
What is the measure of an angle?
Using a protractor the measure of and angle is how many degrees around it is.
How can i find a measure of an angle?
By using a protractor or using trigonometry
how two system of measuring angle?
By using a protractor we can measure an angle
Do you have to measure the sides while measuring an angle?
When measuring an angle you have to measure the sides using a protractor.
How do you work out an angle?
With the information given in the question, the only answer that I can offer is that you measure it, using a protractor.
What is the measure of an angle using a protractor?
A protractor is a tool that may be used to measure an angle. The measure of the angle exists irrespective of the tool that is used to measure it. In the same way that you have a height and your height is a [mainly] fixed amount and whether it is measured with a rule or a tape measure or a laser range finder does not affect your height!
How do you calculate a reflex angle using a protractor?
The other side of the reflex angle will be between 0 and 180 degrees. Measure that angle and subtract the answer from 360 degrees.
How do you measure the contact angle?
There are many ways to measure a contact angle, but the simplest way is to use a goniometer. The image of the droplet is taken with a high resolution camera; the angle can then be measured using a protractor.
How do you trisect an acute angle?
Use a protractor to measure the angle. Divide that number by 3 and that is the required angle. In general, an angle cannot be trisected using a compass and straight edge.
How do you get the degree of a angle?
Unless you have some other source of information, your only option is to measure it - possibly using a protractor.
How do you find the size of an angle without using a protractor?
If the angle is a lone, random angle, I believe you would need a protractor to determine the precise size of the angle (in "degrees"). However, you could, in this case, roughly guess as to whether the angle is acute, obtuse, or right (if the little rectangle is shown in the angle). Of course, if an angle is in a position where one can determine its measure using known postulates or theorems, finding the size of this angle becomes much easier. For example, if you know the measure of one angle and you must determine the measure of another angle, but these two angles are vertical angles, or are corresponding angles (by the corresponding angles postulate), you can indeed determine the measure of this angle without a protractor. Additionally, another example is that if you knew a pair of angles were either supplementary angles, complementary angles, or a linear pair, and you were given the measure of one of these angles, you could determine the measure of the other angle without a protractor. Therefore, it depends on the angle you're looking at.
How can you find right angles without using a protractor?
You can never really be certain about the measure of an angle without using a protractor, or some similar tool. Usually, you can try to "eyeball" it, though. Just remember that a right angle is the same as an angle in a square. It is also a quarter of a whole revolution.
