Question

angleA +angleB=65°,angleB+angleC=140.Find angle A,B,C

Answer 1

if these angles are belongs to triangle then

A+B+C=180----(1)
A+B=65----(2)
B+C=140---(3)
add (2) and (3)
u get A+2B+C=205---(4)
sutract (1) from (4)
B=25
put B =25 in (3)
C=115
put B in (2)
A=40
therefore
A=40,B=25, C=115