![]() The two angles below are measured counterclockwise by using the inner scale or the "scale at the bottom." The acute angle or smaller angle is equal to 45 degrees and the obtuse angle or bigger angle is equal to 145 degrees. They are usually semicircular but also are available in a full circle 360 version. Eureka Math Grade 4 Module 5 Lesson 10 Homework. Another is the protractor, which is handy when youre studying geometry. Examples showing how to measure angles with a protractor Protractor A protractor is a tool used to measure angles A protractor is a transparent plastic tool designed to measure angles. Adjust the protractor in such a way that base line is parallel to the straight-edge of the protractor. In math class, you use many tools, such as a calculator. The number you see on the degree marks is the measure of the angle. Use the outer scale of the protractor if you are measuring clockwise. Use the inner scale of the protractor if you are measuring counterclockwise. We found that most customers choose protractors with an average price of 5.47. We collected and analyzed 32,721 customer reviews through our big data system to write the protractors list. Rotate the protractor by holding down the shift-key + left-mouse button, or use two fingers on your touch device. During our protractor research, we found 122 protractor products and shortlisted 10 quality products. A protractor is a semicircular disk generally calibrated in degrees and used to measure or construct angles. Practice Measuring Angles with an Interactive Protractor Use this interactive protractor app to practice measuring angles on the screen, or download the questions as a pdf worksheet. Put the vertex of the angle you want to measure at the origin of the protractor.Īlign one arm of the angle with the base line of the protractor. The other arm of the angle will point to the measure of the angle. Reading a Protractor Worksheets 5-degree and 1-degree Increments. To measure an angle, follow the steps below: Make sure that the base line of the protractor lines up with the line you drew. Align the origin hole at about the midpoint of the line. In these worksheets, students use a protractor to draw and measure angles and determine if the angles are acute, obtuse, straight or 90 degrees. ![]() drag and drop shapes and rotating and resizable calculator and protractor. The best method is to draw a line running the length of the protractor’s edge. You can use a protractor to measure angles clockwise or counterclockwise from 0 degree to 180 degrees. More Games to Play MATH PLAYGROUND 1st Grade Games 2nd Grade Games 3rd Grade.
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