Thanks to all authors for creating a page that has been read 26,007 times. It can be anything ranging from 91 degrees to 179 degrees. We use cookies to make wikiHow great. Now let's put one of the rays here at 0 degrees. An angle is either acute, right, or obtuse, no matter which way it opens. Looks like the protractor's a little bit easier to manipulate. There are certain steps you need to follow when drawing an angle: First draw one of the lines. Click here for a printable angle drawing worksheet. I can measure an angle using a protractor. There are 3 worksheets included in this download that increase in difficulty. This line will form the... 3. This shows how to use a protractor to draw an angle - 42° in this example. The animated diagram above shows how to use a protractor to measure angles. Normally, instead of moving the angle, you could actually move the protractor to the angle. Ex 14.6, 6 Draw an angle of measure 45° and bisect it Here, we will draw right angle i.e. Please consider making a contribution to wikiHow today. By using our site, you agree to our. 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. (iii) We get the required angle â APQ  =  60Â°. Drawing an Angle 1. Further complementary, supplementary and angles at a point. And then I'll point AB in the-- well, assuming that I'm drawing it exactly the way that it's over there. Line up the bottom of the protractor with the diameter so that the midpoint of the protractor aligns with the center of the circle. In this section, you will learn how to construct angles using protractor. For example, you might need to draw a 45 degree angle. You can do this using a ruler or the straightedge of your protractor. 2.Taking D and E as centres and with the radius more than 1/2 DE, draw arcs to intersect 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. If the angle is facing left, use the top row of numbers. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. 45° using protractor. Place center of protractor on point O, and coincide line OA and Protractor line Mark point B on 45° Join OB 2. Determine the measurement of the angle you are drawing. I can use a protractor to create a give angle. Label this point V. … Flip the paper, keep the protractor on the vertex, and measure from the dotted line to the angle line. Will my angle open to the right, or to the left? Please consider making a contribution to wikiHow today. You will know which line to look at because you know it is an acute angle, and an acute angle should be less open than a 90-degree angle. Students will draw the measurement shown and then name the angle. Line up the bottom edge of the protractor with one leg of the angle. This is how you can use a protractor to measure as well as draw angles, quickly and easily. Constructing Angles using a Protractor Learn to draw angles practically with this hands-on worksheet. To draw 45° using compass, please check Ex 11.1, 2 of Class 9 NCERT We follow these steps Draw a ray OA 2. Easy measure angles, using interactive whiteboard angle simulator. Draw ∠BXA = 110° with the help of a protractor. Once you have this understanding, you can quickly use a protractor to make any size angle between 0 and 180 degrees. When you line up the base line of the protractor with one vector of a right angle, the other vector will line up with the 90-degree mark of the protractor. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. What are angles opening to the left called? If you understand the concept of acute and obtuse angles, however, learning how to use a protractor is easy. Online protractor or angle problems with acute, obtuse, reflex angles. To determine the number of degrees in … And then what you want to do is either rotate the angle or rotate the protractor. In this case, we're going to rotate the protractor. The type of angle is not determined by which way it opens. But if you were to turn that angle around so that it opens to the left, it would still measure 45 degrees, but this time when you measure it, you would have to look at the outer set of numbers. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Example 1 : Construct an acute angle of 60 °. 1. The line is your reference line and the first leg of your angle. This article has been viewed 26,007 times. Since a straight line is 180 degrees, the base line marks a 180-degree angle. https://www.mathsisfun.com/geometry/protractor-using.html, http://www.mathopenref.com/angleright.html, http://www.mathwords.com/a/acute_angle.htm, http://www.mathopenref.com/constdrawangle.html, consider supporting our work with a contribution to wikiHow. If the angle is facing to the right, use the bottom row of numbers on the protractor. If you're referring to a central angle, draw a diameter. Step 1 : Draw … For example, if a 45-degree angle opens to the right, you might have to look at the inner set of numbers. I can sketch angles when given a measurement. (iii) We get the required angle â APQ  =  125Â°. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Try to measure the angles A, B and C inside the triangle. It will be used to determine... 2. The worksheet contains 10 problems. 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. Use on interactive whiteboards, angles can be automatically shown or measured with a protractor. Ruler. How do you use a protractor to draw an angle? 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. Apart from the stuff given in this section, if you need any other stuff in math, please use our google custom search here. A straight angle measures to 180 degrees. Draw a straight line. So let's do that there. Read the degrees where the other side crosses the number scale. Since 45 is less than 90, this is an acute angle. To draw an angle with a protractor, first place the center point along the bottom edge of the protractor where you want the vertex of the angle to be. 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. 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. Now, we use the following steps for required construction 1.Taking X as centre and any radius daw an arc to Intersect the rays XA and XB, say at E and D, respectively. Understanding the Features of a Protractor, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/4a\/Make-Angles-in-Math-Using-a-Protractor-Step-1-Version-2.jpg\/v4-460px-Make-Angles-in-Math-Using-a-Protractor-Step-1-Version-2.jpg","bigUrl":"\/images\/thumb\/4\/4a\/Make-Angles-in-Math-Using-a-Protractor-Step-1-Version-2.jpg\/aid6007870-v4-728px-Make-Angles-in-Math-Using-a-Protractor-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"