Is not it 60? I got all sides equal.
Yes OA is (C) but I had answered 90 degrees. I just can't understand how it'll be 60..can you plz explain ? thanks.
make a triangle by drawing lines first between B and E, then E and G and finally between B and G. these lines are diagnals of all equal squares. so they are equal. They make an equilateral triangle. so an angle is 60.