Question

Which quadrilateral is not a parallelogram?

Answer 1

KITE, TRAPEZIUM and A Concave quadrilateral

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.