What is the measure of angle CED? There are two triangles labeled ABC and DCE with a common vertex C. In triangle ABC, angle BAC is labeled as p, and angle ABC is labeled as 70 degrees. In triangle DCE, angle CDE is labeled as 70 degrees. p over 2, because Triangle ABC is congruent to triangle DCE p + 70 degrees, because Triangle ABC is similar to triangle DCE 110 degrees − p, because Triangle ABC is congruent to triangle DCE p, because Triangle ABC is similar to triangle EDC