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) to ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. So if you're like me, you probably don't carry around a protractor everywhere you go, and even if you ...