How do I find the coordinates of B and D?

[Kulla_9289]

Good luck trying to get the OP to understand it! ?

Here's the kicker: I understood most of it, except the part he used the circle's equation? Why is that usage needed here?

 

[Kulla_9289]

That would appear to be a formula for one of the other vertices, which can be derived from the methods you have been told. Where did you get it?

My instructor used this, but I had no idea how it was derived.

Since you do know about vectors, have you learned anything about rotating vectors, or about perpendicular vectors?

Unfortunately, not yet.

 

[MarkFL]

Here's the kicker: I understood most of it, except the part he used the circle's equation? Why is that usage needed here?

A circle is the set of all points a given distance from some central point, in this case M. We wanted the points that are the same distance from M that A and C are, but lying along the line perpendicular to the line containing A and C.

 

[stapel]

Why is that usage needed here?

It isn't. My apologies.

Eliz.

"Highlander" put in one-week time-out.