Question

in triangle abc to exterior angle B and angle C are 110 degree and 130 degree find all interior angle of triangle​

Answer 1

Answer:

B=110-A _1

C=135-A _2

A+B+C=180

A+110-A+C=180 SUB_1

110+C=180

110+135-A=180 SUB_2

-A=180-235

A=235-180

A=55