Relationship between velocity vector and speed?

61 Views Asked by At

Velocity vector triangle

Hi all,

I'm not too sure if this belongs in the Physics or Maths stack exchange but i feel like this is the most suitable place for it.

Could someone explain why the sum of two velocity vectors (i and j component) is equal to the speed?

Sorry if this diagram or statement doesn't make sense. I've kinda got no clue what's going on. Regardless, thank you for your help!