Distance Formula

$$\text{Bring Your Dog To Work Day}$$

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Today is Bring Your Dog To Work Day! Sadly, my coworker Deena did NOT bring her corgi in today. So all I have to give you is a $2$-dimensional representation of Pixel, the fluffy bootied, cute-snoot boy when he came into the office some other day.

Help me calculate the distance between the office and my coworker Deena's corgi Pixel so I know exactly how far I have to run when I kidnap the little sucker (kidding, dognapping is bad).