The only tools you need to make these shapes are a straight ruler and a compass or dividers (Figure 1). It is also useful to have a protractor (to measure angles) and a drafting square (to make square ...

With a protractor, the angles of any shape can found where two lines meet and form a corner. The shapes themselves can also be identified from this by matching the angles to the shape properties.

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