Question

Two angles of a triangle are 40ans60 fing third angle of triangle

Answer 1

suppose,

∆A=40°,∆B=60° ,∆C=?

∆A+∆B+∆C=180°

40+60+∆C=180°

100°+∆C=180°

∆C=180°-100°

∆C=80°