Parallelograms Geometry

If ABCD is a parallelogram, what is the length of BD? 

Which is NOT a property of a parallelogram?

The opposite angles of a parallelogram are ...

In a parallelogram, consecutive angles are __________.

$$m\angle QRS$$ = ​ (a)   $$m\angle PQS$$ = ​ (b)   $$m\angle RPS$$ = ​ (c)   $$m\angle PSQ$$ = ​ (d)  

(PQRS is a parallelogram)

State which theorem you can use to show that the quadrilateral is a parallelogram.​

Find the values of x and y that make

the quadrilateral a parallelogram.

​ ​ x=​ (a)  

y=​ (b)  

Refer to parallelogram ABCD. LABEL what x and side AB should be.

Refer to parallelogram ABCD. LABEL what angle BCD should be.