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## frx 2 years ago What is the shortest distance from the point (x,y,z) to (a) the xy-plane (b) the x-axis? Could someone please explain this one, maybe with a (x,y,z) graph if possible?

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1. frx

|dw:1359041022174:dw|

2. frx

That's what I think of (a), shouldn't that be somewhat correct? Just get rid of the z and you're on the xy-plane

3. sirm3d

$\Huge \color{blue}\checkmark$

4. frx

|dw:1359041443154:dw|

5. frx

Shouldn't that be the shortest lenght to x?

6. sirm3d

|dw:1359041552842:dw|use pythagorean theorem

7. frx

$\sqrt{y ^{2}+z ^{2}}$

8. sirm3d

right again.

9. frx

Great, having some trouble imagining three dimentions but seems like I'm starting to grasp it

10. frx

Thank you for the help!

11. sirm3d

yw

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