You can find a radius through its volume and height. Multiply the volume by 3. For example, the volume is 20. Multiplying 20 by 3 equals 60.

## How do you find the diameter of a frustum?

d2: Diameter of the base, equal to twice the base radius. r1: Radius of the top of the frustum, equal to half the top diameter. r2: Radius of the base, equal to half the base diameter.

## What is a cone with the top cut off?

A conical frustum is a frustum created by slicing the top off a cone (with the cut made parallel to the base). For a right circular cone, let be the slant height and and the base and top radii.

## How do you find the radius of a slant?

## How do you find the radius with height and slant height?

If you are given the slant height

- The radius r can be found using the formula. radius r. = s. h. where s is the slant height h is the altitude.
- The altitude h can be found using the formula. altitude h. = s. r. where s is the slant height r is the base radius.

## How do you find the radius of a cone with height and angle?

For example, if you know the height h and the angle X, you can use the trig function TAN (tangent) to find the radius: r = h tan(X). And of course since the diameter is just twice the radius, diameter = 2 h tan(X).

## What is the volume of the frustum shown in the figure?

Hence, the volume of the frustum shown in the figure is 359 cm.

## What is the slant height of a frustum?

The slant height of an object (such as a frustum, or pyramid) is the distance measured along a lateral face from the base to the apex along the center of the face. In other words, it is the altitude of the triangle comprising a lateral face (Kern and Bland 1948, p. 50).

## Is a frustum half a cone?

In geometry, a frustum (plural: frusta or frustums) is the portion of a solid (normally a cone or pyramid) that lies between one or two parallel planes cutting it. … In the aerospace industry, a frustum is the fairing between two stages of a multistage rocket (such as the Saturn V), which is shaped like a truncated cone.

## How do you find the height of a frustum pyramid?

If a plane parallel to the base WXYZ of the pyramid cuts it in the plane W’X’Y’Z’ then the portion of pyramid between the planes WXYZ and W’X’Y’Z’ will be a frustum of the given pyramid. The perpendicular distance between this two planes is the height of the frustum.

## How do you calculate the volume of a frustum?

Volume of a conical frustum: V = (1/3) * * h * (r_{1} ^{2} + r_{2} ^{2} + (r_{1} * r_{2}))

## How do you find the radius of a cone without the height?

## What is the radius of a right cone?

The radius of a cone refers to the radius of its circular base. The radius of a cone could be found using its volume and height. The formula for volume is given as, the volume of a cone = (1/3) r^{2}h, where, ‘r’ is the radius and ‘h’ is the height of the cone.

## How do you find the radius of a circle with only the height?

You can find the radius of a circle if you have the length and height of a chord of that circle. Multiply the height of the chord times four. For instance, if the height is two, multiply two times four to get eight.

## How do you find the radius when you have the circumference?

To find the radius from the circumference of a circle, you have to do the following:

- Divide the circumference by , or 3.14 for an estimation. The result is the circle’s diameter.
- Divide the diameter by 2.
- There you go, you found the circle’s radius.

## What is the formula of CSA of cone?

The curved surface area of the cone can be given by finding the area of the sector by using the formula, Area of the sector (in terms of length of arc) = (arc length radius)/ 2 = ((2r) l)/2 = rl.

## How do you find the radius if you have the volume and height?

The radius of a cylinder(r) = (V / h), where V is the volume of a cylinder, h is the height of the cylinder, and (Pi) is a mathematical constant with an approximate value of 3.14.

## How do you find the volume of a frustum of a right circular cone?

Volume, V

- For any Frustum, the volume is V=13(A1+A2+A1A2)h. For frustum of right circular cone, A1=R2 and A2=r2. Thus,
- V=13[R2+r2+R2(r2)]h.
- V=13[R2+r2+Rr]h.

## What is the volume of the truncated pyramidal frustum?

Thus, the formula of volume of a truncated pyramid is V = 1/3 h (a^{2} + b^{2} + ab) where V, h, a and b are volume of the truncated pyramid, height of the truncated pyramid, the side length of the base of the whole pyramid, and the side length of the base of the smaller pyramid.

## How do you make a frustum?

If you cut off the top part of a cone with a plane perpendicular to the height of the cone, you obtain a conical frustum. See figure on the left: the upper base of the frustum has radius r and the lower base has radius R. The height of the frustum is h.

## What is the formula to find the slant height?

The slant height can be calculated using the formula a^2 + b^2 = c^2. In the formula, a is the altitude, b is the distance from the center of the base to the point where the slant height segment starts, and c stands for the slant height.

## How do you find the slant height on a calculator?

Slant Height Calculator

- Formula. L = SQRT ( H^2 + (S/2)^2)
- Side Length or Cone Base Diameter.
- Height.

## How do you convert height to slant height?

Evaluate the equation from the previous step to yield the regular height. For example, if the slant height angle is 30 degrees and the slant height is 20 feet, then use the equation sin(30) = regular height / 20 feet. This yields 10 feet as the regular height.

## How do you find the frustum of a cone?

There are two formulas that are used to calculate the volume of a frustum of a cone. Consider a frustum of radii ‘R’ and ‘r’, and height ‘H’ which is formed by a cone of base radius ‘R’ and height ‘H + h’. Its volume (V) can be calculated by using: V = h/3 [ (R^{3} – r^{3}) / r ] (OR)

## How many frustum can a right circular cone have?

A right circular cone have only one frustum.

## What is the top of a cone called?

A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex.