Question

I GOT ANGLE BOC=140°

HOW TO FIND ANGLE ACB??

Answer 1

Well you know BOC = 140° and you know that BOC is an isosceles triangle because OC and OB are equal being the radius, you also know that sum of all three interior angels of a triangle is 180°. By the definition of tangent, you know angel OCA is 90°. You know subtract from elementary grade. I hope you can do it now.

This should take you somewhere 70°