What is the total number of degrees in the interior angles of a triangle?

A triangle is a fundamental shape in geometry, and one of its most important properties is the sum of its interior angles. Regardless of the type or size of the triangle—whether it is scalene, isosceles, or equilateral—the sum of the measures of the interior angles will always equal 180 degrees. This property can be understood through various methods, such as dividing the triangle into two right triangles or using the concept of parallel lines and transversal angles.

For any triangle, you can visualize the three angles coming together to form a straight line, where if you were to extend a line from one vertex to the opposite side, it would sum the angles on one side as equal to the angle on the other side, ultimately yielding a total of 180 degrees when considering all three angles together. This invariant holds true across all triangles in Euclidean geometry, making 180 degrees the definitive answer regarding the total number of degrees in the interior angles of a triangle.