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#1 2009-02-13 19:39:22
- MoyMarian
- Member
- Registered: 2009-01-10
- Posts: 29
Right Circular Cone II
A right circular cone of slant height 20cm has a radius of 8cm. Find the angle of the sector of a circle of radius 20cm whose area is equal to the lateral area of the cone.
Last edited by MoyMarian (2009-02-13 19:41:16)
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#2 2010-02-03 08:08:53
- longhoffer
- Member
- Registered: 2010-01-31
- Posts: 1
Re: Right Circular Cone II
How to calculate the volume of a concave cone?
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#3 2011-02-22 15:04:50
- Comphomo
- Guest
Re: Right Circular Cone II
201.6 degrees...
#4 2011-02-22 21:13:16
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Right Circular Cone II
Hi MoyMarian;
The lateral surface area of of right circular cone is;
That circle has an area of
The angle of the sector that has an area of 160π is
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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