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Question Stats:
50% (00:49) correct
50%
(00:42)
wrong
based on 9
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Time
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ABCDE is a regular polygon of side 8 cm. What is the length of diagonal AC(in cm)?
A. \(2(2+\sqrt{5})\)
B. \(4(2+\sqrt{3})\)
C. \(4(1+\sqrt{5})\)
D. \(\frac{16}{\sqrt{3}}\)
E. \(8(\sqrt{5}-1)\)
A. \(2(2+\sqrt{5})\)
B. \(4(2+\sqrt{3})\)
C. \(4(1+\sqrt{5})\)
D. \(\frac{16}{\sqrt{3}}\)
E. \(8(\sqrt{5}-1)\)
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utkmittal1
Joined: 09 Mar 2014
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Concentration: General Management, Operations
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GMAT 1: 760 Q50 V42
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Schools: Kellogg '17 (M) Kenan-Flagler '17 (WD) Duke '17 (WA) Tuck '17 (D) Darden '17 (A) Tepper '17 (A$) Johnson '17 (WL)
GMAT 1: 760 Q50 V42
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23 Apr 2014, 09:56
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C it is.
Hint: sin54 = \(\frac{1+\sqrt{5}}{4}\)
Hint: sin54 = \(\frac{1+\sqrt{5}}{4}\)
HBSdetermined
23 Apr 2014, 11:24
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utkmittal1
is there a more GMAT like solution? because i don't get the reason to remember sin54!
