In pentagon PQRST, PQ = 3, QR = 2, RS = 4, and ST = 5. Which of the lengths 5, 10, and 15 could be the value of PT ?
5 only
15 only
5 and 10 only
10 and 15 only
5,10, and 15
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多边形边长条件，任意一条边不能长于别的其他边的总和
任何一个多边形的最后一条边必须比其他边的SUM小。 顺便记下多边形内角和N=180*(n-2)
The last side of any polygon must be less than the sum of the lengths of the other sides. Given sides of 3,2,4 and 5, the length of the 5th side must be less than 3+2+4+5 = 14.
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多边形边长条件，任意一条边不能长于别的其他边的总和
任何一个多边形的最后一条边必须比其他边的SUM小。
顺便记下多边形内角和N=180*(n-2)
谢谢
谢谢
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The last side of any polygon must be less than the sum of the lengths of the other sides.
Given sides of 3,2,4 and 5, the length of the 5th side must be less than 3+2+4+5 = 14.