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.