Which quadrilateral is not a parallelogram?

KITE, TRAPEZIUM and A Concave quadrilateral

Step-by-step explanation:

PARALLELOGRAM: A quadrilateral in which  opposites sides are PARALLEL and EQUAL.

So, Any quadrilateral which does NOT have its opposite sides being parallel  or equal is not a parallelogram.

So, such quadrilaterals are:

1. KITE : A kite is not a parallelogram as it has  no parallel lines at all.

2. TRAPEZIUM : A trapezium has ONLY ONE pair of opposite sides parallel.

3. A Concave quadrilateral  does not have parallel sides.

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.