Question

What is the perimeter of this rectangle?

Answer 1

2 (x_2-x_1) + 2(y_2-y_1)

Explanation:

Length of rectangle = l ( say )

=> l = √(x_1 - x_2)² + (y_2-y_2)²

=> l = √(x_1-x_2)² = x_1 - x_2 / x_2 - x_1

Let breadth = b ,

=> b = √(x_1-x_1)² + (y_2-y_2)²

=> b = y_2-y_1

So , perimeter will be ,

2(l + b)

2 (x_2-x_1) + 2(y_2-y_1)