Decide whether the statement is true or false.
11.) if a quadrilateral is a rectangle, then it is a parallelogram.
12.) if a quadrilateral is a parallelogram, then it is a rhombus.
13.) if a quadrilateral is a square, then it is a rhombus.
14.) if a quadrilateral is a rectangle, then it is a rhombus.
15.) if a rhombus is a square, then it is a rectangle.

11. true

12. true

13. false

14. false

15.  true

Explanation:

11. rectangle- a figure with four straight sides and four right angles, especially one with unequal adjacent sides.

parallelogram- a four sided figure with opposite sides parallel.

12. rhombus- a parallelogram with opposite equal angles and four equal sides. (usually acute and obtuse opposite equal angles but includes squares.)

13. square- a figure with four equal sides and four right angles

14. ^^ refer back to rectangle and rhombus definitions.

15. ^^refer back to definitions of rhombus, square and rectangle.

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