单项选择题

A certain rectangle has perimeter 54．If the ratio of the length of the rectangle to the width is 5 to 4，what is the length of the rectangle（）

A. 30
B. 27
C. 24
D. 18
E. 15

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What is the area of the hexagonal region shown in the figure above（）

A.A
B.B
C.C
D.D
E.E
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What is the maximum number of nonover-lapping regions into which 3 lines can divide the interior of a circle（）

A. 4
B. 6
C. 7
D. 8
E. 9
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