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 ...

Forget hunting for a tape measure or a protractor. Use your Android phone camera and sensors to handle different types of measurements easily.

Just have a look at the edges of your desk; the hands of a clock or the keys on your computer. There are examples everywhere. Angles are measured using degrees, ranging from 0 all the way to 360 ...

Polygons are multi-sided shapes with different properties. Shapes have symmetrical properties and some can tessellate. Loci and constructions - Eduqas Loci are a set of points with the same property.