1. Find the area of a circle with perimeter 24π cm .
2. A sector has radius 10cm and area 40π cm^ . Find the perimeter of the sector.
Form Two Maths
2007-08-21 12:38 am
回答 (4)
2007-08-21 1:23 am
✔ 最佳答案
1)radius=24÷2=12
area=12x12xπ=452.16cm^2
2)
40π/(10x10xπ)=0.4
(2x10xπx0.4)+2x10
=25.12+20
perimeter=45.12cm
2007-08-21 12:49 am
equation of area of a circle is πr²
equation of diameter of a circle is 2rπ
1.answer is 144π or 452.3893421......(cm)
2.answer is 8π or 25.1327123......(cm)
equation of diameter of a circle is 2rπ
1.answer is 144π or 452.3893421......(cm)
2.answer is 8π or 25.1327123......(cm)
2007-08-21 12:41 am
1. 24^ x π=answer
2007-08-21 12:40 am
1. 24^ x π=answer
收錄日期: 2021-04-13 13:18:55
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