Question

If angles HGF is 89 degrees then angles HGI equals____

Answer 1

The line HG divides the line FI at point G. That means two angles have been formed which are, angle HGF and HGI.

Sum of angles on a straight line equals 180. If angle HGF and angle HGI both lie on the same line (FI), it means then, that;

HGF + HGI = 180

89 + HGI = 180

Subtract 89 from both sides of the equation and you have

HGI = 91