摘要: 本文将平面几何中的三角形等角线定理与角平分线定理推广至球面几何的球面三角形中，并通过球面三角形的梅涅劳斯定理和塞瓦定理给出了球面三角形中等角共轭点的概念。

Abstract: In this paper, we spread the triangle isogonal line theorem and angle bisector theorem in plane geometry to the spherical triangle in spherical geometry, the concept of isogonal conjugate pointsin spherical triangle is given by proving Menelaus’s theorem and Ceva’s theorem of spherical triangle.