Question: Two circles are shown in the diagram C d 1 C2 d 2r Since all circles are similar a proportion can be set up using

 Two circles are shown in the diagram C d 1 C2

d 2r Since all circles are similar a proportion can be set

Two circles are shown in the diagram C d 1 C2 d 2r Since all circles are similar a proportion can be set up using the circumference and diameter of each circle Sub the values d 1 C and d 2r into the proportion C C d d Which shows how to correctly solve for C the circumference of any circle with radius r

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