Question

3.In∆ABC∠A=73⁰

and∠ B=65⁰

.∠BCDisanexteriorangleof∆ABCso find

themeasureof∠BCD.


4.Writeconverseoffollowingstatement:Ifalltheanglesofatrianglearecongruent,

thenitsallsidesarecongruent.​

Answer 1

Answer:

in ABC =

A= 73

B= 65

C= A+B=180.

C= 138-180

C= 42

D= 65+ 42+X

D= 107+X

D= 107 -180

D=73

B+C+D=180.

65+42+73

=BCD= 180