Two sides of a square lie on the lines `x+y=1a n dx+y+2=0.` What is its area?

Explanation

To find the area of the square whose two sides lie on the lines \( x + y = 1 \) and \( x + y + 2 = 0 \), we can follow these steps:

### Step 1: Identify the equations of the lines
The two lines given are:
1. \( x + y = 1 \)
2. \( x + y + 2 = 0 \) which can be rewritten as \( x + y = -2 \)

### Step 2: Determine if the lines are parallel
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