Question

in triangle ABC if ab =ac and angle b =70 find angle a

Answer 1

ab=ac
/C = /B
/C =70°
in triangle ABC
angle a = 180°-(70°+70°)
=180° -140°
=40°

Answer 2

/_ C =70
70+70=140
so /_ A = 180-140=40
Hope it Helps...