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Height of Rotunda given Circumsphere Radius Calculator

Formula Used:

\[ h = \sqrt{1+\frac{2}{\sqrt{5}}} \times \frac{2 \times r_c}{1+\sqrt{5}} \]

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1. What is the Height of Rotunda?

The Height of Rotunda is the vertical distance from the top pentagonal face to the bottom decagonal face of the Rotunda. It is an important geometric measurement in understanding the dimensions of this Johnson solid.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ h = \sqrt{1+\frac{2}{\sqrt{5}}} \times \frac{2 \times r_c}{1+\sqrt{5}} \]

Where:

Explanation: This formula calculates the height of a Rotunda based on its circumsphere radius, using mathematical relationships derived from the geometry of this polyhedron.

3. Importance of Height Calculation

Details: Calculating the height of a Rotunda is essential in architectural design, geometric modeling, and understanding the spatial properties of this specific Johnson solid.

4. Using the Calculator

Tips: Enter the circumsphere radius in meters. The value must be positive and valid for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a Rotunda in geometry?
A: A Rotunda is a Johnson solid (J6) consisting of a pentagonal cupola attached to a decagonal base, creating a specific polyhedral shape.

Q2: What is the circumsphere radius?
A: The circumsphere radius is the radius of the sphere that contains the Rotunda such that all vertices touch the sphere.

Q3: Are there other ways to calculate the height?
A: Yes, the height can also be calculated using edge length or other geometric properties, but this formula specifically uses the circumsphere radius.

Q4: What are typical values for Rotunda dimensions?
A: Dimensions vary based on the specific Rotunda, but all follow precise mathematical relationships defined by its geometry.

Q5: Can this formula be used for architectural applications?
A: Yes, this formula is useful for architectural design and modeling when working with Rotunda-shaped structures.

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