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 ...

Geometry is one of the oldest fields in mathematics. It developed from the 'act of measuring' or 'for the purpose of measuring.' So, what does it mean 'to measure' in geometry? A mathematician and a ...

A technician often has to sketch or design ductwork and the other parts of an HVAC system. Sometimes you have to sketch the room or building you are working with. This means working with lines, angles ...