Triangles
Triangles can be named for their sides and for their angles.
Triangles Named For Sides
The sides of an equilateral triangle are all equal in length.
An isosceles triangle has two sides that are equal in length.
A scalene triangle has no sides that are equal in length.
Triangles Named For Angles
A right triangle has one right angle.
An obtuse triangle has one obtuse angle.
An acute triangle has three acute angles.
Learn more about triangles by reading the explanation below.
Practice Time! Identify the triangles in the exercise below.