$\"\"$

Bases and sides:

Each pair of opposite sides of a parallelogram has the same measure.

Each base and side is 5.4cm long. $\"\"$

Perimeter:

The Perimeter of a polygon is the sum of the measures of its sides.

$\"\"$

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ cm. (Add: $\"\"$ ) $\"\"$

Height:

Here parallelogram is a square.So,side will be the height. Height $\"\"$ cm.

Area:

$\"\"$ (Area of parallelogram)

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

The Perimeter of the polygon is $\"\"$ cm and area $\"\"$ .