Form 2 數學 ( 圓 )
回答 (3)
2007-06-01 2:12 am
✔ 最佳答案
圓周差:2(r+3)pie-2rpie
=2rpie+6pie-2rpie
=6pie
2007-06-01 2:20 am
Let the radius of the larger circle be x,and therefore the smaller one be (x-3).
Circumference of the larger circle
=2xπ cm
Circumference of the smaller circle
=2(x-3)π
=(2x-6)π cm
The difference in their circumference
=2xπ-(2x-6)π
=(2x-2x+6)π
=6π cm
Circumference of the larger circle
=2xπ cm
Circumference of the smaller circle
=2(x-3)π
=(2x-6)π cm
The difference in their circumference
=2xπ-(2x-6)π
=(2x-2x+6)π
=6π cm
2007-06-01 2:13 am
設兩圓的半徑為r及r+3cm
圓周的差 = 2 * pi * (r+3) - 2 * pi * r cm = 18.85 cm
圓周的差 = 2 * pi * (r+3) - 2 * pi * r cm = 18.85 cm
參考: me
收錄日期: 2021-05-03 12:56:39
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