Defining Triangles

There are multiple types including:

- Acute Triangle: three acute angles
- Equiangular Triangle: three congruent acute angles
- Right Triangle: one right angle
- Obtuse Triangle - one obtuse angle



Holt Geometry Book

The definition of a triangle is a polygon that is three-sided.


Here are their classifications by their side lengths:

- Equilateral Triangle: three congruent sides
- Isosceles Triangle: at least two congruent sides
- Scalene Triangle: no congruent sides



Holt Geometry Book