What is the sum of the angles in a triangle?

In a triangle, the sum of the interior angles is always 180 degrees. This rule applies to all types of triangles, whether they are scalene, isosceles, or equilateral. The reason behind this can be understood by considering a triangle drawn on a flat plane. If you take any triangle and extend one of its sides, creating an exterior angle, the interior angle and the two adjacent angles on the straight line will always combine to equal 180 degrees. Furthermore, by varying the types of triangles, such as changing the angles while ensuring they still meet at points to maintain the triangle shape, the total will remain consistent at 180 degrees. This fundamental property helps in solving various geometric problems involving triangles, making it a crucial concept for students to remember.