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What is the formula for the volume of a right cone with base area B and height h?
V = 1/3Bh
The formula for suface area of a cone?
Since the base of a cone is a circle, we substitute 2πr for p and πr2 for B where r is the radius of the base of the cylinder. So, the formula for the lateral surface area of a right cone is L. S. A. = πrl, where l is the slant height of the cone.
The base area of a cone or cylinder with radius r is B equals?
The base of a cone or cylinder is a circle. It the radius is r then the base area B=Pi(r2)
How do you use gradients to find out if the triangle is right angled?
Not the best way of finding out if a triangle is right angled. But if you can find two if the sides which have gradients which when multiplied together gives -1, then the angle between them is a right-angle. This comes from the fact that if the slope of a line is a/b, then the slope of a perpendicular line is -b/a and the product of (a/b)(-b/a)=-1.
How to find the volume of a right circular cone with a base radius of 3ftand a height of 9 ft?
The formula for the volume of a right circular cone is: V = 1/3Bh where B is the base area and h is the height. Since the base is a circle, use pi r2, the formula for the area of a circle, to calculate the base area. Use 3.14 to approximate pi. The base area in this problem would be: 3.14(3)2 = about 28.26 sq. ft. Therefore the volume of the cone would be: 1/3(28.26)(9) = about 84.78 cu. ft.
