What are Equilateral Triangles?
Trigonometry (the study of triangles) forms a huge component of the National 5 course, and it plays an equally important role in all levels of maths you can pursue beyond National 5.
One of the most fundamental geometric facts about triangles is:
The interior angles of any triangle always sum to \boldsymbol{180^\circ}.
It is also important to understand the various types of triangles that can be constructed:
You will also be familiar with right-angled triangles. These can be either isosceles or irregular as these examples show: