Which of the following statements is false? Select all that apply.
1- All trapezoids are parallelograms.
2- All parallelograms are trapezoids.
3- All squares are rectangles.
4- All rhombuses are rectangles.
5- All rectangles are squares.

Parallelograms, which have two pairs of parallel sides, should be regarded as trapezoids. Others define a trapezoid as a quadrilateral with at least one pair of parallel sides (the inclusive definition), making the parallelogram a special type of trapezoid.

So a square is a special kind of rectangle, it is one where all the sides have the same length. Thus every square is a rectangle because it is a quadrilateral with all four angles right angles. However not every rectangle is a square, to be a square its sides must have the same length.
Rhombuses may be rectangles, as long as the shape is a square.

Hence from the above three statements we could clearly see that option (1),(4) and (5) are false statements.

Which of the following statements is false? Select all that apply. 1- All trapezoids are parallelograms. 2- All parallelograms are trapezoids. 3- All squares are rectangles. 4- All rhombuses are rectangles. 5- All rectangles are squares.

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Which of the following statements is false? Select all that apply.
1- All trapezoids are parallelograms.
2- All parallelograms are trapezoids.
3- All squares are rectangles.
4- All rhombuses are rectangles.
5- All rectangles are squares.