#Measure angles with a protractor download
If you need a protractor you can download and print our printable protractor. Note that were looking at the blue numbers. Tip: To get the correct measurement, make sure that one arm is pointing at 0. Then, measure the size of the opening that the two arms form. The vertex is the point where the two arms meet. Use our angle conversion tool to convert from degrees to radians, mils, or grads. First, put the vertex at the center of the protractor. Since most protractors have measurements in degrees it is often necessary to use a formula to convert your measurement to radians, mils, or grads. Make a mark on the paper as close as possible to the tick mark.įinally, complete the line by connecting the vertex and the angle mark you just added using the straight edge of the protractor or a ruler. The next step is to locate the tick mark corresponding to either the obtuse or acute angle you wish to draw. Now, align the origin of the protractor with the vertex on the line, then align the base line of the angle with the line on the bottom of the protractor. Step 3: Align the Protractor on the Vertex Next, draw the vertex of the angle at the end of the line. This is the base line or arm of the angle The first step is to draw a straight line on a sheet of paper using the straight edge. Protractors are also great for drawing accurate angles. The measurements should be incrementing in the direction you are measuring. There are two rows of tick marks on a protractor to allow measuring the degrees of angle from either the left or right. If the acute angle is on the right then the tick mark will be on the inside of the curve. If the acute angle is on the left the tick mark will be on the outside, or outer-most edge, of the protractor. With the origin of the protractor aligned over the vertex of the angle and the horizontal edge aligned with one of the lines, find the tick mark along the curve where the line meets. If a line were to meet another line forming two angles, the acute angle would be the smaller angle. Īn acute angle is the smaller angle where a line meets another, or technically any angle that is less than 90°.Īn obtuse angle is the larger angle where a line meets another, or technically any angle that is more than 90°.Ī right angle is an angle that is exactly 90°, which means that the two lines are exactly perpendicular to each other. There are 360 degrees in a circle and angles 1, 2, and 3 together complete the circle.There are three types of angles that you can find using a protractor: acute, obtuse, and right. The sum of angles 1, 2, and 3 equals 360 degrees. Angle 3 is a straight line, so it follows that the sum of angles 1 and 2, 180°, is also a straight line. The sum of angles 1 and 2 is 180 degrees. What is the sum of angles 1 and 2? How does that number compare to angle 3? You should find that the angles measure as follows: Measure angles 1, 2, and 3 using a protractor to follow the steps above. Read the degrees off the protractor where the line of the other side is or mark a point along the edge at the appropriate angle measurement.Įxample 1 - Part A.Make sure one side of the angle is on the zero line.Place the hole of the protractor over the point of the angle where the lines meet.There is a small hole in the center of the protractor.
![measure angles with a protractor measure angles with a protractor](https://i5.walmartimages.com/asr/388e82f1-626b-427c-b5eb-df0ee6ac9f81.6d35eed67abc1de8b9a018e8fc8e6cec.jpeg)
#Measure angles with a protractor full
As shown below, a protractor is a half or full circle measuring device, marked in degrees along the outer edge, with a straight line running from 0° to 180°. A protractor is used for measuring angles. There are 360° in a full circle, and 90° in a right angle.
![measure angles with a protractor measure angles with a protractor](https://ecdn.teacherspayteachers.com/thumbitem/Measuring-Angles-using-a-protractor-Worksheets-3928885-1588086659/original-3928885-2.jpg)
![measure angles with a protractor measure angles with a protractor](http://1.bp.blogspot.com/-PqGXr4cgXTo/ULzRQXBNKGI/AAAAAAAAAgM/Caa04IsJzLU/w1200-h630-p-k-no-nu/protractor.gif)
Degrees are the unit of measure used for angles, just as feet are used to measure distance.