What is the distance between the points
Question:

What is the distance between the points A (c, 0) and B (0, −c)?

Solution:

We have to find the distance between $\mathrm{A}(c, 0)$ and $\mathrm{B}(0,-c)$.

In general, the distance between $\mathrm{A}\left(x_{1}, y_{1}\right)$ and $\mathrm{B}\left(x_{2}, y_{2}\right)$ is given by,

$\mathrm{AB}=\sqrt{\left(x_{2}-x_{1}\right)^{2}+\left(y_{2}-y_{1}\right)^{2}}$

So,

$\mathrm{AB}=\sqrt{(c-0)^{2}+(0-c)^{2}}$

$=c \sqrt{2}$

 

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