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Mathematics 9 Online
OpenStudy (anonymous):

PLEASE HELP MEDAL AWARDED TO CORRECT ANSWER: The diagram below shows a pentagram (a five-pointed star) inscribed inside a regular pentagon. There are several golden ratios in this figure. For example: and . This means that if length a = 2, then length b = 3.236. In this case, what is length c? A. 2.618 B. 1.618 C. 0.618 D. 5.236 E. 4.236

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