Question

Help with this one to please no answers just help

Answer 1

Do you know what the sum of all angles in a square / rectangle / trapezoid etc.  is ?

Answer 2

in general.

Answer 3

For that first question, there is a rule that says if two angles are inscribed on the same chord and on opposite sides of the chord, then they are supplemental.

Answer 4

So you can see that GJI and GHI are inscribed on the same chord of the circle and on opposite sides.