The angles of a triangle always add up to 180 degrees. No matter the type of triangle—whether it is scalene, isosceles, or equilateral—this rule holds true.
This property can be understood by considering the nature of triangles and how angles work. When you have a triangle, each angle contributes to the entire shape, and together, they form a closed figure. If you were to take one angle and extend a line from one vertex to another, you can see how the angles on either side of that line will still sum up to 180 degrees.
For example, if you have a triangle with one angle measuring 60 degrees, and another measuring 50 degrees, you can find the third angle by subtracting the sum of the two known angles from 180 degrees. That leaves you with 70 degrees for the third angle (60 + 50 + 70 = 180).
This fundamental property of triangles is essential in various fields such as geometry, architecture, and engineering, making it a key concept in understanding the shape and space around us.