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【OG20-P292-440题】
In the figure above, PQR and STU are identical equilateral triangles, and PQ = 6. What is the perimeter of polygon PQWTUVR?
(1) Triangle SWV has perimeter 9.
(2) VW has length 3.5.
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题干:两个三角形的边长都是6
总的周长是36
条件1:已知△SWV周长是9,剩下的就是七边形PQWTUVR周长:36-9=27,充分
条件2:不充分
题目讨论 (5条评论)

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贾思敏
这道题,容易卡在条件二,以为吧会凭借VW的边长值搞出什么其他的套路来,其实就是不知道SW、SV的长度,也是白搭,这个题在习题课还是难题100那里有讲过
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0 回复 2021-10-04 17:10:43
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Stanley想去荷兰
我寻思着题干也只是说他两等边三角形。没说他俩是一样的呀???
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0 回复 2020-01-10 13:21:35
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你这只猪回复Stanley想去荷兰
全等等边三角形
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0 回复 2020-07-14 10:33:59
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贾思敏回复Stanley想去荷兰
认真读题吧,PQR and STU are identical equilateral triangles 就是说他们是一毛一样的等边三角形
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0 回复 2021-10-04 17:08:53
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11
(1) Triangle SWV has perimeter 9. perimeter of polygon PQWTUVR = twice perimeter of PQR - the perimeter of SWV We can know the perimeter of PQR and of SWV => Sufficient (2) VW has length 3.5 We do now know the perimeter of SWV if we just have the length of VW => Insufficient Ans: A
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0 回复 2017-11-19 06:47:20
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qpalzm
(1)小三角形周长9,所以ST+SU+QR-(SWV)+PQ+PR+TU即(6+6+6-9)+6+6+6=27 (2)notsufficient
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0 回复 2017-07-29 15:44:55
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闪闪的闪闪
???
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0 回复 2017-06-25 12:48:30