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OG 16: DS 137

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besos Newbie | Next Rank: 10 Posts Default Avatar
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OG 16: DS 137

Post Sat May 28, 2016 11:28 am
Can someone help me understand why the answer is A?

137. In the figure above, PQR and STU are identical equilateral triangles, and PQ = 6. What is the perimeter of polygon PQWTUVR?

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OptimusPrep Master | Next Rank: 500 Posts
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Post Sun May 29, 2016 8:18 pm
besos wrote:
Can someone help me understand why the answer is A?

137. In the figure above, PQR and STU are identical equilateral triangles, and PQ = 6. What is the perimeter of polygon PQWTUVR?
Hi besos,

Please ensure that you upload the diagram and write the full question. This is a DS question and you have missed both the statements here.

Coming to the question:

Given: PQR and STU are identical equilateral triangles and PQ = 6
This means both the triangles have the same sides and angles

Required: Perimeter of PQWTUVR

Statement 1: Triangle SWV has perimeter 9
Perimeter of PQWTUVR = sum of perimeters of both the triangles - the perimeter of SWV
SUFFICIENT

Statement 2: VW has length 3.5.
This does not tell us anything about the triangle SVW
INSUFFICIENT

Correct Option: A
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