In quadrilateral abcd , angle a=57 degrees , angle b=65 degrees and angle c=118 degrees what is the measure of an exterior angle at d

The total measure of the interior angles of a quadrilateral is 360 degrees
you are given 57, 65, 118
That is 240
to solve for the last angle
360-240
120
The exterior angle of a D would be the number that you add that will make it 180 degrees.
meaning 180-120 is 
The exterior angle of angle D is 60 degrees.

Hope this helps

It creates dogx^2 and then flip your answer and multiply by 2

Where’s the problems ? ?