what topic is this

I know this is in analytic geometry but which sub topic?

i was looking for it from the new notes i got but i cant seem to find this kind of topic:

calculate the distance between the following pairs of points:

(4,6) and (6,5)?

Quote:

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Originally Posted by behindDkeys

calculate the distance between the following pairs of points:

(4,6) and (6,5)?

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I would say co-ordinate geometry.