question_answer

Name the following angles of Fig. using three letters:

(a) \[\angle 1\]

(b) \[\angle 2\]

(c) \[\angle 3\]

(d) \[\angle 1+\angle 2\]

(e) \[\angle 1+\angle 2+\angle 3\]

(f) \[\angle CBA-\angle 1\]

 

Answer:

(a) \[\angle \text{1}=\angle CBD\]

(b) \[\angle 2=\angle DBE\]

(c) \[\angle 3=\angle EBA\]

(d) \[\angle 1+\angle 2=\angle CBE\]

(e) \[\angle 1+\angle 2+\angle 3=\angle CBA\]

(f) \[\angle CBA-\angle 1=\angle DBA\]