i need help proving that these two circles are similar
i am aware that all circles are similar but i still
have to prove it, please help? medal + fan

Question

anonymous · Answer

(not asking for an answer but i am asking for guidance)

tkhunny · Answer

All circles are similar.  Done.

campbell_st · Answer

use the ratio of the radii

anonymous · Answer

I can't say that but thanks @tkhunny

tkhunny · Answer

Yes, you can.  Why is the radius special?  It's no more apparent or significant than the entire circle.

anonymous · Answer

That's true.

campbell_st · Answer

similar shapes have all linear measurements in the same ratios...

campbell_st · Answer

oops should have said all corresponding measurements in the same ratio

tkhunny · Answer

That's the problem with a radius.  Which one?  There is no order to determine which are corresponding.

tkhunny · Answer

Several valid ways to go about it. https://learnzillion.com/lessonsets/427-prove-that-all-circles-are-similar

campbell_st · Answer

is might sound trivial, but knowing the ratio of the radii you could show the circumferences are in the same ratio... 

and you could show that the areas are in a ratio that is the square of the linear ratio

anonymous · Answer

Thanks for the link! @tkhunny 

Those are good points @campbell_st

anonymous · Answer

Thank you both for helping me out though! :]