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Math Help - Finding radius of circle

  1. #1
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    Finding radius of circle

    The five lines of a star pentagram is 10 cm. Find the radius of the cricle that will circumscribe the pentagram.

    I thought the answer would be 5cm because the diameter had to 10 right? But I checked the answer page and the answer was 5.3cm.
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  2. #2
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    The total length of all five lines is 10cm?
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  3. #3
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    Quote Originally Posted by Vertazontal View Post
    The total length of all five lines is 10cm?
    Each line is 10cm.
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  4. #4
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    Quote Originally Posted by brownjovi View Post
    Each line is 10cm.
    I'll see what I can do. I have no trig experience but this doesn't seem too hard.

    Edit: If anything, it's one of the few unanswered questions on the entirety of these forums. The older members get to them way too fast!
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