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Here are 2 circles. The smaller circle has radius r, circumference c, and diameter d. (I'm confused about how to explain this problem so I need some help.)

 May 22, 2020

Best Answer 

 #1
avatar+978 
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Well then everything must be increased by k times on the larger one.

 

Why?

 

It says "the larger circle is a dilation of the smaller circle by a factor of k", which means the larger circles is k times larger. Which means that all parts of it are k times larger.

 

If the smaller circle's circumference is 2πr, we have 2πr * k = 2πR.

 May 22, 2020
 #1
avatar+978 
+3
Best Answer

Well then everything must be increased by k times on the larger one.

 

Why?

 

It says "the larger circle is a dilation of the smaller circle by a factor of k", which means the larger circles is k times larger. Which means that all parts of it are k times larger.

 

If the smaller circle's circumference is 2πr, we have 2πr * k = 2πR.

hugomimihu May 22, 2020

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