In circle O, a diameteer has endpoints (-5,4) AND (3,-6). What is the length of the diameter?

Question

e.mccormick · Answer

OK, they are trying to confuse you with all this circle talk.  That diameter is just a line between two points, (-5,4) and (3,-6).  So use the distance formula and that is that.$$\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$$

anonymous · Answer

@e.mccormick so I just plug those numbers in rgiht?

anonymous · Answer

@e.mccormick I don't have the calculator :(

e.mccormick · Answer

Yah, you plug in numbers. http://www.google.com/search?num=20&site=&source=hp&q=calculator&btnG=Search

anonymous · Answer

@e.mccormick If AB=5x-9, DC=x+3 and EF = 2x+2 what is the length of EF??

e.mccormick · Answer

Hmm...  They seem to want you to solve for x and use it....

e.mccormick · Answer

Wish I had an example to work backwards from on that one.  It is four unknowns in three equations, so not always solvable.  If I saw a related example, I would know what they were really looking for.

anonymous · Answer

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