Of the following two statements , which is a good definition ? Explain . " A rectangle is a parallelogram with 4 right angles . " " A rectangle is a parallelogram . " The first statement ; it is reversible . B. The first statement , a rectangle can either be a parallelogram , or it can have four right angles . The second statement all parallelograms are also rectangles . D. The second statement : a rectangle is always a parallelogram , but it may not have exactly four right angles .