A protractor is used to draw and measure angles. An angle is the amount of turn between two lines. Angles are measured in degrees with the symbol °. Angles can be labelled with 3 letters (eg DEF ...

Discover how to measure angles using a protractor with this Year 5 article from BBC Bitesize.

Electronic enthusiasts that need to measure angles on their robotic arm or other projects may be interested in a new proximity sensor that has been created by William Moore called the Protractor.

Actually, you would have to take your angle measurement and subtract from 90° to get your latitude. Also, there is a straw on top of my protractor to assist with the aiming—and it looks cool.

When it comes to measuring the angles, things need to be a little more exact than holding up a plastic protractor; that’s where a theodolite comes in, a telescope-looking type of optical ...

But you don’t have to break out the protractor; you can easily use a level to determine the angle of the cut.