A parallelogram containing a `60^0` angle has perimeter `p` and its longer diagonal is of length `d` Find its area.

Explanation

To find the area of a parallelogram that contains a \(60^\circ\) angle, has a perimeter \(p\), and a longer diagonal of length \(d\), we can follow these steps:

### Step 1: Define the sides of the parallelogram
Let the lengths of the sides of the parallelogram be \(x\) and \(y\). Since it is a parallelogram, the opposite sides are equal, so we have:
- Side 1 = \(x\)
- Side 2 = \(y\)

### Step 2: Use the perimeter to find a relationship between \(x\) and \(y\)
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