Constructing a triangle using a protractor There are two types of triangle that you might be required to construct using a ruler and protractor.

There are two ways to construct a triangle using a ruler and a protractor. The first is a Side, Angle, Side (SAS) construction where two sides and the angle between them is known. The second is an ...

But you don’t have to break out the protractor; you can easily use a level to determine the angle of the cut.