maths.trigonometry
2011-07-23 1:44 am
A chord of length 8cm divides a circle of radius 5cm into two parts.Find the area of each part.
回答 (1)
2011-07-23 4:27 am
✔ 最佳答案
Let half of the subtended angle of the minor circle is xsin x = 4/5 => x = 53.13 = 0.9273 rad
So, the area of the minor part
= (1/2)(5^2)(1.8546)
= 23.1825 cm^2
The area of the larger part
= (1/2)(5^2)(4.4286)
= 55.3573 cm^2
收錄日期: 2021-04-15 15:28:34
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