alleryThe distance between two points $P(x_1,y_1)$ and $Q(x_2,y_2)$ is:
A$\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
B$(x_2-x_1)^2+(y_2-y_1)^2$
C$\sqrt{(x_2+x_1)^2+(y_2+y_1)^2}$
D$\sqrt{(x_2-x_1)^2-(y_2-y_1)^2}$
Answer & Solution
Correct answer: A. $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
Distance formula: √[(x₂−x₁)²+(y₂−y₁)²].
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