But many people would not be able to tell you what the triangle symbol on a clothes label means, even though you've probably got it on hundreds of items of clothing. The white triangle on clothes ...

Label the angles and side, leaving the construction lines. Triangles A and D can be constructed using a protractor and ruler. Triangle A includes two angles and the side between them (ASA).

When buying clothes, how often do you look at the washing label to check the care instructions? These days most fast fashion ...