The sum of the measures of the angles of a triangles is 180

Answer 1

Every triangle in 2 dimensions has angles that sum to 180 degrees or pi radians

But not in non-Euclidian space, such as a triangle on a sphere's surface, formed by a latitude line and 2 longitude lines. The sum of the angles = 180 + the area of the 3D triangle.

Answer 2

Hi Maria! I assume this is a true/false question? It is true that all the angles of a triangle add up to be 180. This can be though of as a straight line or half of a circle. I hope this helps!