Why Are the Angles of Equilateral Triangles Always Equal to 60°?

Why Are the Angles of Equilateral Triangles Always Equal to 60°?

Note:

Did you know that the interior angles of an equilateral triangle will always measure the same, no matter the size of the equilateral triangle? In this tutorial, you'll see how to find the measurements of the interior angles of an equilateral triangle. Take a look!

Keywords:

  • equilateral
  • equilateral triangle
  • angles
  • angle
  • triangle sum theorem
  • 180
  • 180 degrees
  • add to 180
  • find angles
  • find missing angles
  • triangle
  • triangles

Background Tutorials

  • Planes and Angles

      • What is an Angle?What is an Angle?

      What is an Angle?

      Angles are a fundamental building block for creating all sorts of shapes! In this tutorial, learn about how an angle is formed, how to name an angle, and how an angle is measured. Take a look!

  • Polygon Definitions

      • What are Interior and Exterior Angles of a Polygon?What are Interior and Exterior Angles of a Polygon?

      What are Interior and Exterior Angles of a Polygon?

      Sometimes a math term can really tell you a lot about the thing it's describing. Think about the terms interior angle and exterior angle. Can you guess where each is located on a polygon? Take a look at this tutorial to find the answer and learn about interior and exterior angles!

  • Triangle Definitions

      • What is a Triangle?What is a Triangle?

      What is a Triangle?

      You can't learn everything about math without dealing with triangles. Did you know that there are different types of triangles? Check out this tutorial, and learn about triangles and their different types!

      • What are Equilateral, Isosceles, and Scalene Triangles?What are Equilateral, Isosceles, and Scalene Triangles?

      What are Equilateral, Isosceles, and Scalene Triangles?

      Did you know that there are different kinds of triangles? Knowing how to identify these triangles is an important part of solving many problems involving these triangles. Check out this tutorial and learn about some of the different kinds of triangles!

  • Finding Corresponding Parts

      • What Does Congruent Mean?What Does Congruent Mean?

      What Does Congruent Mean?

      If two figures have the same size and shape, then they are congruent. The term congruent is often used to describe figures like this. In this tutorial, take a look at the term congruent!

  • Solving Equations by Dividing

Further Exploration

  • Finding Angles in Triangles

      • How Do You Find a Missing Angle in a Triangle?How Do You Find a Missing Angle in a Triangle?

      How Do You Find a Missing Angle in a Triangle?

      Trying to find a missing interior angle measurement in a triangle? Already know the other two interior angle measurements? Then you're set! Just remember that the interior angles of a triangle ALWAYS add up to 180 degrees. This tutorial shows you how to put this knowledge into an equation and solve to find that missing measurement!

      • How Do You Find Missing Angles in an Isosceles Triangle?How Do You Find Missing Angles in an Isosceles Triangle?

      How Do You Find Missing Angles in an Isosceles Triangle?

      Trying to find a missing interior angle measurement in a triangle? See if you're working with a special type of triangle such as an equilateral or isosceles triangle. If you are, that knowledge can help you. In this tutorial, see how identifying your triangle first can be very helpful in solving for that missing measurement. Take a look!