can two radii of a circle always form a diameter of the circle?why?

Question

anonymous · Answer

no.|dw:1325558808571:dw|

anonymous · Answer

diameter has to be a straight line

anonymous · Answer

Lengthwise they do, my bad!

turingtest · Answer

I don't like the wording of this question.
"can they always form a diameter" well yes, but only if you break them up.
I'm inclined to agree with imranmeah, but if you allow the rearrangement of the radii, then you you can technically form a diameter from two radii.
Still, I say imranmeah is correct.

anonymous · Answer

center point, two end points of the radii must be collinear

anonymous · Answer

in order to form the diameter of the circle

chriss · Answer

BY the use of the word always in the question, I would also agree that two radii for a circle do not *always* form its diameter.