The distance between two points $P(x_1,y_1)$ and $Q(x_2,y_2)$ is:
- $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
- $(x_2-x_1)^2+(y_2-y_1)^2$
- $\sqrt{(x_2+x_1)^2+(y_2+y_1)^2}$
- $\sqrt{(x_2-x_1)^2-(y_2-y_1)^2}$
Show answer and solution
Correct answer: A. $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
Distance formula: √[(x₂−x₁)²+(y₂−y₁)²].