In most practical work, angles are measured in degrees and fractions of a degree. Smaller units have been defined as follows:
60 minutes = 1 degree abbreviated as 60′ = 1°
60 seconds = 1 minute abbreviated as 60′′ = 1′
In some trades, angles are usually rounded to the nearest degree. For most technical purposes, angles can be rounded to the nearest minute. For a few trades, angles are rounded to 2 decimals of a second.
Check out the ADVANCED tab. It is very important to read about degrees and other units of angular measure and use a modern scientific calculator. Get a $20-or-so dual-display scientific calculator, even if you can`t take it with you into the test hall. A calculator is also a learning tool, Technology Use is one of the 9 Essential Skills you can`t do without. Trying out the angular functions on a calculator will further your understanding and help with building a bigger mental picture. It builds links between numbers and algebra. It is important to try alternative calculations or approaches, to sketch & label angles, tracking changes to units of measure, visualizing to cross-link the concepts of angles and numbers. If you spend 20 – 40 min working with the different ideas in the ADVANCED page, you`ll remember key information easier and you`ll learn new skills faster.