Question

For which of the following statements is the contrapositive false?
1.If a quadrilateral is a trapezoid, then the quadrilateral does not have two sets of parallel sides.

2.If a quadrilateral is a trapezoid, then the quadrilateral does not have four right angles.

3.If a quadrilateral is a square, then the quadrilateral is a rectangle.

4.If a quadrilateral is a rectangle, then the quadrilateral is a square.

im leaning towards four but still really unsure

Answer 1

yep 4

Answer 2

If the implication is false, then its contrapositive will also be false. Look for a false statement that is given in the problem.

Answer 3

thx it was 4

Answer 4

4.If a quadrilateral is a rectangle, then the quadrilateral is a square.
is false so its contrapositive has to be false.