What is the total number of degrees in a triangle?

In a triangle, the sum of all interior angles is always 180 degrees. This is a fundamental property of triangles in Euclidean geometry. Regardless of the type of triangle—whether it is acute, obtuse, or right—the total measure of the angles will always add up to 180 degrees.

For instance, in an equilateral triangle, each angle measures 60 degrees, which sums to 180 degrees (60 + 60 + 60). In a right triangle, one angle is 90 degrees, and the other two angles must sum to 90 degrees to again total 180 degrees.

Understanding this property is crucial, as it underpins many geometric concepts and is used in various applications, including calculating unknown angles and solving problems involving triangle properties. Therefore, the correct total number of degrees in any triangle is indeed 180 degrees.