# Which instrument can measure angles?

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The protractor is an essential geometric measuring instrument, enabling you to measure and trace angles with precision. It generally takes the form of a semicircle graduated from 0 to 180 degrees, but complete 360-degree protractors are also available for measuring larger angles. Used mainly in mathematics, geometry and technical drawing, the protractor is an indispensable tool for students, engineers, architects and artists.

The operation of the protractor is simple: to measure an angle, simply align the center of the protractor with the vertex of the angle, then align one of the sides of the angle with the base line of the protractor. The number at which the other side of the angle crosses the protractor’s scale gives the angle’s measurement in degrees.

In addition to measuring angles, the protractor can be used to plot specific angles. By placing the protractor on a starting point and marking the desired degree on the paper, it is possible to draw a precise angle from this point.

Historically, the protractor is an ancient tool, with early versions dating back several centuries. As drawing tools and technologies have evolved, digital versions of the protractor have become available, enabling even more accurate measurements in computer-aided design (CAD) software.

However, the protractor remains an essential element in teaching, where it helps students understand fundamental geometric concepts such as angles, triangles and other geometric shapes. In short, the protractor is a simple but essential tool for anyone wishing to measure or trace angles accurately.

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## Which instrument can measure angles?

Answer

The protractor is an instrument used to measure angles. It is commonly used in mathematics, geometry and technical drawing to measure and plot precise angles.