#### Transcript of Classifying Triangles

**Classifying Triangles**

There are two ways to classify triangles:

By Angles and...

By Sides.

**Angles**

Acute Triangle

Obtuse Triangle

Right Triangle

Equiangular Triangle

A triangle with exactly 1 right angle

A triangle with exactly 1 obtuse angle

A triangle with 3 acute angles

A special acute triangle where all the angles are congruent

**Sides**

Scalene Triangle

Isosceles Triangle

Equilateral Triangle

A triangle where none of the sides are congruent

A triangle where exactly 2 sides are congruent

A triangle where all 3 sides are congruent

All Equiangular Triangles are Equilateral Triangles AND

All Equilateral Triangles are Equilangular.

**To officially name a triangle, you need the side name first then the angle name:**

Example:

This is a scalene right triangle

**Now you try:**

Obtuse Scalene Triangle

Acute Isosceles Triangles

Full transcript