Final answer:
Yes, the triangle angle sum theorem is true on the surface of a sphere. However, the sum of the angles in a triangle on a sphere will be greater than 180 degrees.
Step-by-step explanation:
Yes, the triangle angle sum theorem is true on the surface of a sphere. However, the sum of the angles in a triangle on a sphere will be greater than 180 degrees. On a sphere, the sum of the angles in a triangle will depend on the surface curvature. The larger the surface curvature, the greater the sum of the angles will be. This can be demonstrated using spherical geometry.