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what is a counterexample for the following conjecture if a counterexample does not exist choose not possible conjecture all quadrilaterals are rectangles

Respuesta :

Counter example:-  a trapazoid is a quadrilateral  which has only one pair of parallel sides unlike a rectangle which has 2.  So the conjecture is false.

Answer:

a trapezoid is a quadrilateral and it is not a rectangle

Step-by-step explanation:

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