Given that the radius of circle E is 13 cm, and the diameter of circle F is 21 cm, what can be concluded about the two circles?

Question

anonymous · Answer

Here are the answer choices from my study guide

The circles are similar and congruent 
The circles are similar
The circles are neither similar nor congruent
The circles are congruent only

nikato · Answer

|dw:1388901860318:dw| ok, can u find the radius of circle F

anonymous · Answer

|dw:1388901984060:dw|

nikato · Answer

ok, but like the lengh of it

anonymous · Answer

No That is  one of the things I am having trouble with

nikato · Answer

to finid the radius. all u have to do is divide the length of the diameter by 2