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If all four angles of a quadrilateral are right angles, then the quadrilateral is a square. Which of the following is a counterexample to this assertion?

A.a rectangle that is not a square

B.a trapezoid

C.a parallelogram that is not a rectangle

D.a rhombus that is not a square

Verified Answer :

Answer is choice A.

We can draw out a rectangle that is stretched out and not a square. This rectangle will have all four angles equal to 90 degrees (right angles).

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