# Types of Triangles

They are distinguished by the size of their sides and by the measure of their internal angles. It is important to mention that the triangle is a polygon with three sides, joined by its three vertices that make up three angles.

## Types of triangles according to their sides

It is a three-sided polygon, depending on the size and the relationship of the sides to each other, there are different types of triangles:

**Isosceles Triangle**– Shows two sides of equal length.**Equilateral triangle**: all three sides have the same measure, therefore all three angles are equal.**Scalene triangle**: its three sides have other measures.

## Types of triangles according to their angles

A triangle has three interior angles that total 180º. According to the measure of the angles, the triangles are the following:

**Acute triangle**: all three angles measure less than 90º, that is, they are acute angles.**Right triangle**: one of the angles of the triangle measures 90º, that is, it is a right angle.**Obtuse triangle**: one of the angles is an obtuse angle, therefore it is greater than 90º.

## Types of Triangles

types of triangles | Triangle Name | Characteristic |

It depends on the size of its sides. | Isosceles | Both sides equal in size. |

Equilateral | All three sides are the same size. | |

Scalene | The three sides have different measurements. | |

According to your angles | acute angle | All three angles measure less than 90º. |

obtuse angle | One of the angles measures more than 90º. | |

Rectangle | One of the angles measures 90º. |