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圓柱的底面半徑為:18.84÷2÷3.14÷2=1.5(厘米);所以這個圓柱的底面積是:3.14×1.52,=3.14×2.25,=7.065(平方厘米);答:這個圓柱的底面積是7.065平方厘米.
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