What are protractors used for

what are protractors used for

How to Use a Protractor: Your Complete Guide

Using a Protractor. This is a protractor, it helps you measure angles (in degrees). Protractors are fun and easy to use. Have a look at this animation (press the play button) to see how to make a neat angle using a protractor and ruler. Set squares, also known as triangle protractor, are used to draw parallel and perpendicular lines. The divider is used to measure the length between two points. Protractors have been in use since the seventeenth century. It is used for navigation in the sea and land.

A circle divided at an interval of 1. A small microscope has been fitted through which circle graduation can be seen. The adjustable blade is attached to a rotating member that moves its what are protractors used for. A bevel protractors come with a magnifying glass, which helps when reading angles more precisely. It is designed to allow the user to move the blade around, especially with a higher degree of accuracy, when trying to create the final alignment to measure the object.

The figure shows on the main scale are graduated in degrees of arc. It has 12 divisions on each side of the centre zero. If you have any questions about this topic you ask me in the comments.

If you like this article please share with your friends. The How to do work at home data entry Post. By Saif M. On: May 13, Bevel Protractor Contents show. Bevel Protractor. Types of Bevel Protractor 2. Mechanical Bevel Protractor. Optical Bevel Protractor. Parts of a Bevel Protractor 3.

Magnifying Glass. Main Scale. Vernier Scale. Fine Adjustment Knob. Tags mesuring instruments screw gauge micrometer vernier caliper. Saif M Saif M. He completed his engineering studies in and is currently working in a large firm as Mechanical Engineer. He is also an author and editor at theengineerspost.

Measuring instruments. Fluid Mechanics. Its Advantages and Disadvantages.


Protractor A protractor is a tool used to measure angles. Most protractors measure angles in degrees (). When using a protractor, notice that the outside set of numbers goes from 0 to degrees where the 0 is on the left side of the protractor while the inner set goes from to 0 degrees where 0 is on the right side of the protractor. Feb 23, How to Use a Protractor Now that you know understand angle notation, you are ready to learn how to use the protractor tool to find the measure of an angle. Example: Use a protractor to find the measure of ?MLN in the diagram below. Protractor, any of a group of instruments used to construct and measure plane angles. The simplest protractor comprises a semicircular disk graduated in degreesfrom 0 to . It is an ancient device that was already in use during the 13th century.

February 23, by Anthony Persico. Welcome to this free lesson guide where you will learn how to read a protractor and how to use it to measure angles. This complete guide on how to use a protractor includes several examples, an animated video mini-lesson, and a free worksheet and answer key. Note that the middle letter denotes the vertex point of the angle.

But what happens when the angle measures are not included on the diagram? How can you find the measure of the angles in these kinds of situations?

If so, check out our short animated video lesson on how to name angles before moving forward with the protractor lesson. Click here to watch the video on YouTube. Now that you know understand angle notation, you are ready to learn how to use the protractor tool to find the measure of an angle. First, make sure that you correctly identify the angle in question.

If you find having the angle colored helpful, you can use markers or highlighters whenever you are using a protractor to measure angles on paper. Quick Note: Before moving forward, identify the Center Marker on your protractor. The next step is to line up the center marker of the protractor with the vertex point of the angle point L in this example as follows:.

Make sure that the bottom ray of the angle segment LN in this example is aligned with the bottom of the protractor as shown in the diagram. Now that you have your protractor in position, the last step is to use it to identify the angle measure. In order to do this, we must identify where the top ray of the angle segment LM in this example intersects with the protractor and then read the measurements. Notice that where segment LM crosses the protractor, there are two values: 60 and Below are a few more examples of how to read a protractor.

Check out the video lesson below to learn more about how to measure angles using a protractor. Are you looking for some extra practice with using a protractor to measure angles?

Click the links below to download your free worksheets and answer key:. Have thoughts? Share your thoughts in the comments section below!

Never miss a Mashup Math blog--click here to get our weekly newsletter! You can often find me happily developing animated math lessons to share on my YouTube channel. Or spending way too much time at the gym or playing on my phone. Learn how to solve these kinds of problems. This is where the protractor tool comes in! Need some more help with naming angles? How to Use a Protractor Now that you know understand angle notation, you are ready to learn how to use the protractor tool to find the measure of an angle.

How to Read a Protractor. Example E: Right Angles. Pretty cool, right? Still confused? Protractor Practice Worksheet. Keep Learning:. Bar Charts and Bar Graphs Explained! How to Factor a Trinomial in 3 Easy Steps. Solving Systems of Equations Explained! Probability Tree Diagrams Explained!

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