# how to use a protractor to draw an angle

So once again, I'll put A at the center, and then AC I'll put along the 0 degree edge of this half-circle or of this protractor. The line is your reference line and the first leg of your angle. Place the centre of the protractor at the vertex dot and the baseline of the protractor along the arm … Recognize the indicated measure on the inner scale of the protractor and construct the angles. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. Flip the paper, keep the protractor on the vertex, and measure from the dotted line to the angle line. (iii) We get the required angle â APQ  =  125Â°. Use in conjunction with our Drawing Angles – Poster. For example, a 120-degree angle is obtuse, because 120 is greater than 90. For a description of the protractor see The Protractor For a demonstration of using the protractor to draw an angle see Drawing Angles with a Protractor wikiHow is where trusted research and expert knowledge come together. Protractors can also be used to draw an angle having a specific measure. Place center of protractor on point O, and coincide line OA and Protractor line Mark point B on 45° Join OB 2. Label this point V. … If the angle is facing to the right, use the bottom row of numbers on the protractor. Drag the protractor and rotate it using arrow keys. A 180° angle forms a straight line. To know how to construct angles using ruler and compass. And then I'll point AB in the-- well, assuming that I'm drawing it exactly the way that it's over there. It can be anything ranging from 91 degrees to 179 degrees. This shows how to use a protractor to draw an angle - 42° in this example. Further complementary, supplementary and angles at a point. If you know you are looking for an obtuse angle, you know to use the 120-degree mark, because an obtuse angle should be more open than a 90-degree angle. (This does not have to be a long line; around 4-5 cm, an inch, is fine) Next place the middle of the protractor on the end of the line. Ruler. Note whether the angle is acute or obtuse. A straight angle measures to 180 degrees. Either way, it is an acute angle. Online protractor or angle problems with acute, obtuse, reflex angles. How to measure an angle with a protractor: Place the midpoint of the protractor on the VERTEX of the angle. In this section, you will learn how to construct angles using protractor. For example, if you counted 20° from the dotted line, the reflex angle measures 180 + 20 which is 200°. You can do this using a ruler or the straightedge of your protractor. Once you have this understanding, you can quickly use a protractor to make any size angle between 0 and 180 degrees. Now, use the the following steps to construct angles of (1)40° 2() 160° (3) 120° 1.Taking O as centre and any radius draw an arc which intersect OA at E and OO at F. 2.Taking E and F as centres and radius more than 1/2 EF draw arcs which intersect each other at P. Line up the bottom edge of the protractor with one leg of the angle. 45° using protractor. For example, you can draw a 45 degree angle opening to the left, or opening to the right. For example, if a 45-degree angle opens to the right, you might have to look at the inner set of numbers. Grab your own protractor and place it in an appropriate position over the given rays. Draw ∠BXA = 110° with the help of a protractor. And the other side of the angle is within the protractor… I can use a protractor to create a give angle. That means you will use the set of numbers that gives you the smaller angle, since the angle will open less than halfway towards a straight line. Every day at wikiHow, we work hard to give you access to instructions and information that will help you live a better life, whether it's keeping you safer, healthier, or improving your well-being. 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. First, draw an angle of 80° say ∠QOA = 180° with the help of protractor. For example, you... 2. It does not matter which end you choose here. Place the origin of the protractor at one end of the line. Ex 14.6, 6 Draw an angle of measure 45° and bisect it Here, we will draw right angle i.e. There are 3 worksheets included in this download that increase in difficulty. To construct an angle using protractor, we must need the following mathematical instruments. This is how you can use a protractor to measure as well as draw angles, quickly and easily. Read the degrees where the other side crosses the number scale. To determine the number of degrees in … For example, a 45-degree angle is acute, because 45 is less than 90. Use the protractor to draw any central angle up to 180°, using another diameter (or radius) to complete the angle. If one look at the object has you completely confused, never fear; learning to use the tool is simple. Click here for a printable angle drawing worksheet. This point will be … Now let's put one of the rays here at 0 degrees. (i) On PA from the right start counting from 0Â° in the ascending order (counter clock wise direction and finally mark a point Q using a sharp pencil at the point showing 60Â° on the semi-circular edge of the protractor. Please consider making a contribution to wikiHow today. If you line up the base line of the protractor with one vector of a 45-degree angle, the other vector will line up with the 45-degree mark and the 135-degree mark of the protractor. What are angles opening to the left called? Last Updated: March 29, 2019 Learn how to use a protractor to create different types of angles from scratch. wikiHow's. For example, you might need to draw a 45 degree angle. … wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. A right angle is an angle that is exactly 90 degrees. Questions of increasing difficulty which should enable students to understand how to read angles off and draw an angle on printed protractors as a preliminary to using a real protractor. This is halfway between either side of the protractor. % of people told us that this article helped them. Place your protractor on the straight line to measure the acute angle. 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