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# Here are 2 circles. The smaller circle has radius r , circumference c , and diameter d.

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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

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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
+978
+3

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