Different Types of Triangles

July 24, 2020
SAC Tutoring


There are many types of triangles that you will come across in math. In this post we are going to look at the 6 most common triangles you will see in math questions.


Let's start with the basics

  1. A triangle consists of 3 sides.
  2. The sum of all angles in a triangle is 180°

These two rules are true for ANY type of triangle. Keep this in mind as we go through the different types.


1. Right angle triangle


The little square in the corner means the angle equals 90°










2. Acute triangle


This is where all corners of triangles are acute angles (smaller than 90°)










3. Obtuse triangle


This triangle has one corner that contains a obtuse angle (larger than 90°)




4. Equilateral triangle


When all sides and angles are the same and all of them equal 60°



5. Isosceles triangle


Two of the sides and two of the angles are the same.







6. Scalene triangle

No sides or angles are equal to one another.




You will use these triangles in math all throughout high school so make sure you are familiar with all the different triangles!


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