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单选题
A
4π+8
B
8π+4
C
8π+8
D
16π+4
E
16π+8
参考答案
参考解析
解析:
The perimeter of the shaded region is the sum of the circumference of semicircle P and the length of diameter AB. Since AB = 7 - (-1) = 8, the diameter of circle P is 8, so, circumference semicircle P = 1/2 (πD)= (1/2) ×(8π)= 4π
Hence, the perimeter of the shaded region is 4π+8.
Hence, the perimeter of the shaded region is 4π+8.
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十进制,二进制,八进制和十六进制转换正确的是()。A、(76)10=(1001100)2=(114)8=(4C)16B、(76)10=(1001100)2=(114)8=(4B)16C、(76)10=(1001100)2=(114)8=(4E)16D、(76)10=(1001100)2=(104)8=(4D)16
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