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24 Mar 2015, 02:33
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (01:06) correct
17%
(01:58)
wrong
based on 83
sessions
History
Date
Time
Result
Not Attempted Yet
Attachment:
sawtooth_figure.PNG [ 4.1 KiB | Viewed 17124 times ]
What is the perimeter of ABCDE?
A. \(60\)
B. \(36+12\sqrt{3}\)
C. \(36+8\sqrt{3}\)
D. 48
E. \(36+6\sqrt{3}\)
24 Mar 2015, 21:07
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Turkish
Refer diagram below:
Attachment:
sawtooth_figure.PNG [ 5.07 KiB | Viewed 16813 times ]
\(\triangle ADE\)leads to an equilateral triangle
Perimeter = 12*5= 60
Answer = A
General Discussion
24 Mar 2015, 04:23
Kudos
Bookmarks
notice that \(150^{\circ}=90^{\circ}+60^{\circ}\)
So the figure can be split to form a square and an equilateral triangle, both with side 12.
The perimenter is \(12\cdot 5=60\)
so A
So the figure can be split to form a square and an equilateral triangle, both with side 12.
The perimenter is \(12\cdot 5=60\)
so A
