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Inradius of Pentagon given Circumradius Formula

GoInradius of Pentagon given Edge Length using Central Angle Formula

GoInradius of Pentagon given Circumradius using Central Angle Formula

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The Inradius of Pentagon is defined as the radius of the circle which is inscribed inside the Pentagon. Check FAQs

r i = \frac{\sqrt{25 + (10 \cdot \sqrt{5})}}{\sqrt{50 + (10 \cdot \sqrt{5})}} \cdot r c

r_i - Inradius of Pentagon?r_c - Circumradius of Pentagon?

Inradius of Pentagon given Circumradius Example

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Here is how the Inradius of Pentagon given Circumradius equation looks like with Values.

Here is how the Inradius of Pentagon given Circumradius equation looks like with Units.

Here is how the Inradius of Pentagon given Circumradius equation looks like.

7.2812 = \frac{\sqrt{25 + (10 \cdot \sqrt{5})}}{\sqrt{50 + (10 \cdot \sqrt{5})}} \cdot 9

7.2812m = \frac{\sqrt{25 + (10 \cdot \sqrt{5})}}{\sqrt{50 + (10 \cdot \sqrt{5})}} \cdot 9m

7.2812 = \frac{\sqrt{25 + (10 \cdot \sqrt{5})}}{\sqrt{50 + (10 \cdot \sqrt{5})}} \cdot 9

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Inradius of Pentagon given Circumradius Solution

Follow our step by step solution on how to calculate Inradius of Pentagon given Circumradius?

FIRST Step Consider the formula

r i = \frac{\sqrt{25 + (10 \cdot \sqrt{5})}}{\sqrt{50 + (10 \cdot \sqrt{5})}} \cdot r c

Next Step Substitute values of Variables

∴

r i = \frac{\sqrt{25 + (10 \cdot \sqrt{5})}}{\sqrt{50 + (10 \cdot \sqrt{5})}} \cdot 9m

Next Step Prepare to Evaluate

∴

r i = \frac{\sqrt{25 + (10 \cdot \sqrt{5})}}{\sqrt{50 + (10 \cdot \sqrt{5})}} \cdot 9

Next Step Evaluate

∴

r i = 7.28115294937453m

LAST Step Rounding Answer

∴

r i = 7.2812m

Inradius of Pentagon given Circumradius Formula Elements

Variables

Functions

Inradius of Pentagon

The Inradius of Pentagon is defined as the radius of the circle which is inscribed inside the Pentagon.

Symbol: r_i

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Inradius of Pentagon

Circumradius of Pentagon

The Circumradius of Pentagon is the radius of a circumcircle touching each of the vertices of Pentagon.

Symbol: r_c

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Circumradius of Pentagon

sqrt

A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.

Syntax: sqrt(Number)

Other Formulas to find Inradius of Pentagon

Go Inradius of Pentagon given Edge Length using Central Angle

r i = \frac{l e}{2 \cdot \tan (\frac{π}{5})}

Go Inradius of Pentagon given Circumradius using Central Angle

r i = r c \cdot \cos (\frac{π}{5})

Go Inradius of Pentagon given Height using Central Angle

r i = \frac{h}{1 + (\frac{1}{\cos (\frac{π}{5})})}

Go Inradius of Pentagon given Height

r i = \frac{h}{\sqrt{5}}

How to Evaluate Inradius of Pentagon given Circumradius?

Inradius of Pentagon given Circumradius evaluator uses Inradius of Pentagon = sqrt(25+(10*sqrt(5)))/sqrt(50+(10*sqrt(5)))*Circumradius of Pentagon to evaluate the Inradius of Pentagon, Inradius of Pentagon given Circumradius is defined as the length of the line joining the center and a point on the incircle of the Pentagon, calculated using circumradius. Inradius of Pentagon is denoted by r_i symbol.

How to evaluate Inradius of Pentagon given Circumradius using this online evaluator? To use this online evaluator for Inradius of Pentagon given Circumradius, enter Circumradius of Pentagon (r_c) and hit the calculate button.

FAQs on Inradius of Pentagon given Circumradius

What is the formula to find Inradius of Pentagon given Circumradius?

The formula of Inradius of Pentagon given Circumradius is expressed as Inradius of Pentagon = sqrt(25+(10*sqrt(5)))/sqrt(50+(10*sqrt(5)))*Circumradius of Pentagon. Here is an example- 7.281153 = sqrt(25+(10*sqrt(5)))/sqrt(50+(10*sqrt(5)))*9.

How to calculate Inradius of Pentagon given Circumradius?

With Circumradius of Pentagon (r_c) we can find Inradius of Pentagon given Circumradius using the formula - Inradius of Pentagon = sqrt(25+(10*sqrt(5)))/sqrt(50+(10*sqrt(5)))*Circumradius of Pentagon. This formula also uses Square Root (sqrt) function(s).

What are the other ways to Calculate Inradius of Pentagon?

Here are the different ways to Calculate Inradius of Pentagon-

Inradius of Pentagon=(Edge Length of Pentagon)/(2*tan(pi/5))
Inradius of Pentagon=Circumradius of Pentagon*cos(pi/5)
Inradius of Pentagon=(Height of Pentagon)/(1+(1/cos(pi/5)))

Can the Inradius of Pentagon given Circumradius be negative?

No, the Inradius of Pentagon given Circumradius, measured in Length cannot be negative.

Which unit is used to measure Inradius of Pentagon given Circumradius?

Inradius of Pentagon given Circumradius is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Inradius of Pentagon given Circumradius can be measured.

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