Remember the distance formula:

d = √(x₂ - x₁)² + (y₂ - y₁)²

Coordinate Pair One: (,)

Coordinate Pair Two: (,)

d = √({{x2}} - {{x1}})² + ({{y2}} - {{y1}})²

d = √{{x2 - x1}}² + {{y2 - y1}}²

d = √{{((this.x2 - this.x1)*(this.x2 - this.x1))}} + {{((this.y2 - this.y1)*(this.y2 - this.y1))}}

d = √{{((this.x2 - this.x1)*(this.x2 - this.x1)) + ((this.y2 - this.y1)*(this.y2 - this.y1))}}

d = {{Math.sqrt(((this.x2-this.x1)*(this.x2-this.x1))+((this.y2 - this.y1)*(this.y2 - this.y1)))}}