What is the meaning of BC and AD B.C. and A.D. ? What does Anno Domini mean? Does B.C. mean Before Christ? What is the meaning of BCE and CE B.C.E. and C.E. ?.TTales . Na figura abaixo, DE paralelo a CB , AB di metro da circunfer ncia de centro O e B o ponto de tang ncia do segmento CB circunfer ncia.. AB C=A BC , AB=BA, A B C =AB AC, A =A, AB=.Triangle Proof Exam Name _____ Given CD. is the altitude to . AB AE. is the altitude to . BC. CD AE. Prove ABC. is isosceles.There is a triangle ABC, with two points D and E on BC. Can you prove AB AC>AD AE?.