Triangles are named for their sides or for their angles.

Sides:
If a triangle has sides all the same length, the triangle is equilateral.
If a triangle has two sides the same length, the triangle is isosceles.
If a triangle has sides of all different lengths, the triangle is scalene.

Angles:
If a triangle has one obtuse angle, the triangle is an obtuse triangle.
If a triangle has three acute angles, the triangle is an acute triangle.
If a triangle has one ninety degree angle, the triangle is a right triangle.
 

* The three angles of a triangle total 180°.

* The individual measured angles of an equiangular triangle is 60°.

* An equilateral triangle is also an equiangular triangle.