Question

In the diagram, AB and CD are ____.

A. common external tangents
B. common internal tangents
C. uncommon tangents
D. simultaneous tangents

Answer 1

I think it is common internal tangents..

Answer 2

The internal tangents intersect at some point between the two circles

the external tangents intersect at some point that isn't between the two circles

Answer 3

Oh, okay. I was looking up pictures of internal and external tangents, and the image I was looking for was not coming up :O

Answer 4

this page may help

http://www.regentsprep.org/regents/math/geometry/gp14/TanCircles.htm

look at the part that has "4 Common Tangents"