Points D, E, and F are connected to form a triangle along the surface of a sphere. Points A, B, and C are connected to form a triangle on a Euclidean plane. m∠DEF + m∠EFD + m∠FDE = 180° m∠E + m∠F + m∠D = m∠A + m∠B + m∠C m∠E + m∠F + m∠D > m∠A + m∠B + m∠C m∠E + m∠F + m∠D < m A + m B + m C