Which of these is the distance formula?
sqrt(x2−x1)+(y2−y1)\\sqrt{(x_2-x_1) + (y_2-y_1)}sqrt(x2−x1)+(y2−y1)
sqrt(x2−x1)2+(y2−y1)2\\sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}sqrt(x2−x1)2+(y2−y1)2
(x2−x1)2+(y2−y1)2(x_2-x_1)^2 + (y_2-y_1)^2(x2−x1)2+(y2−y1)2
∣x2−x1∣+∣y2−y1∣|x_2-x_1| + |y_2-y_1|∣x2−x1∣+∣y2−y1∣