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题库 / GMATAdvanced-DS-53
When opened and lying flat, a birthday card is in the shape of a regular hexagon. The card must be folded in half along 1 of its diagonals before being placed in an envelope for mailing.Assuming that the thickness of the folded card will not be an issue, will the birthday card fit inside a rectangular envelope that is 4 inches by 9 inches?
(1)Each side of the regular hexagons 4 inches long.
(2)The area of the top surface(which is the same as the area of the bottom surface)of the folded birthday cardis less than 36 square inches.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
请问条件2为什么错呢？
X
设边长为x，要能放进去，则根据对角线9高8能算出来边长要小于等于4.5，边长平方小于等于20.25
(2)六边形面积=3根号3/2*x^2
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