Parallelograms

Why is a kite not a parallelogram?

What is the difference between a parallelogram and a kite?

_____ is a quadrilateral that is both a kite and parallelogram.

In the parallelogram XYWZ, ∠XZW + ∠YWZ = _____ degrees.

Which of the following is true for the adjacent angles of a parallelogram?

$\mathrm{ABCD}$ is a parallelogram, $\mathrm{AE}$ bisects $\angle \mathrm{A}$ and $\mathrm{CF}$ bisects $\angle \mathrm{C}$. If $\angle \mathrm{DAB}=60°$

Prove that $\mathrm{AE}\parallel \mathrm{CF}$.

Consider the Parallelogram and answer the following question.

Is $\stackrel{\_\_}{AB}\parallel \stackrel{\_\_}{CD}$ ? (opposite sides) 

In the following figure, two intersecting diagonals have been drawn.
If the end points of these diagonals are joined, what type of quadrilateral would you get?

Find the missing angles in the following parallelograms :

ABCD is a parallelogram in which a pair of adjacent angles are in the ratio $1:2$. Find the measure of all the angles.

ABCD is a parallelogram.
Find the values of, $x$, $y$ and $z$.

The lengths of the two sides of a parallelogram are $3x$ and $5x$. The perimeter is $480$cm. Find the value of $x$.

If a parallelogram has one angle measuring $60˚$, find out the measure of the other angles.

If an angle of a parallelogram is twice its adjacent angle, then the angles are:

The adjacent sides of a parallelogram are $7 \mathrm{cm}$ and $10 \mathrm{cm}$. Its perimeter is _____.