x>=360+90=450
即x最小是540,所以是5邊形
不等式中的360是因為任意多邊形,外角和都是360度,90是題目說的
x是內(nèi)角和
所以內(nèi)角和大于等于外交和+90度
沒有內(nèi)角和會等于450,最小的是540
而540正是五邊形的內(nèi)角和
所以是五邊形
it is known that the sum of the interior angles of a regular polygon is at least 90度 greater than that of its exterior a
it is known that the sum of the interior angles of a regular polygon is at least 90度 greater than that of its exterior angles.Find the least possible number of sides of the polygon
書上answer是5.
還有...要列出不等式啦...
書上answer是5.
還有...要列出不等式啦...
數(shù)學(xué)人氣：121 ℃時間：2020-04-28 08:44:52
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