An infected first branchial cleft sinus or fistula may cause aural drainage in the absence of otitis media or otitis externa. A child presenting with both a draining ear and a tender mass in the neck may rarely have a first branchial cleft cyst associated with a sinus or fistula tract.
1 What is formed when two complementary angles share one ray? A. the complementary angles form a line with the shared ray B. the complementary angles form a right angle with the shared ray C. the complementary angles form vertical angles with the shared ray D. the complementary angles form an obtuse angle with the shared ray The answer is B right??? Mathematics.
Also, $\angle$ABD and $\angle$DBC together form right angle $\angle$ABC. Thus, if two angles are together and are complement to each other then they have a common vertex and share one side and are called Adjacent complementary angles. The other two non-shared sides of the angles form right angle.