Angle sum property of quadrilateral

In the below parallogram find /_I and /_G by any other method? (hint: angle-sum property of a quadrilateral)

What Is A Polygon?|What Is A Quadrilateral?|Angles Sum Property Of Quadrilaterals|OMR

Angle sum Properties OF Quadrilateral || Triangle|| Types OF Quadrilateral|| trapezium|| Rectangle|| Square|| Parallelogram|| Rhombus|| nth side polygon||Interior/Exterior angle properties|| Angle sum properties OF nth side polygon

What is the sum of the measures of the angles of a convex quadrilateral?Will this property hold if the quadrilateral is not convex?(Make a non-convex quadrilateral and try).

What is the sum of the measures of the angles of a convex quadrilateral? Will this property hold if the quadrilateral is not convex? (Make non-convex quadrilateral and try!)

What is the sum of the measures of the angles of a convex quadrilateral? Will this property hold if the quadrilateral is not convex? (Make a non-convex quadrilateral and try!)