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<pitemprop="usageInfo" style="margin:12px">Trigonometric functions with an "Arc" prefix refer to the angle corresponding to a value of that function.</p>
<metaitemprop="description" content="Lookup-based trigonometry value finder for the calculator apps. Values aligned to circumference=6.4radius with ~ ± rad / 100 accuracy.">
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<metaitemprop="disambiguatingDescription" content="The steps are limited by the number of entries. However, aligned to circumference=3.2diameter makes it more accurate than tools that produce results with many decimals for any value but based on the pi=3.14...">
<metaitemprop="description" content="Calculte the area of a regular polygon from the number and length of its sides.">
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<metaitemprop="disambiguatingDescription" content="With trigonometric functions aligned to circumference=3.2*diameter, instead of the pi=3.14... approximate.">
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<metaitemprop="usageInfo" content="Enter the number and the length of the sides of a regular polygon.">
<metaitemprop="description" content="Calculte the area of a circle segment from its height and either its chord length or the radius of its parent circle.">
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<metaitemprop="disambiguatingDescription" content="Area based on the A(circle)=3.2*radius^2 formula, instead of the pi=3.14... approximation">
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<metaitemprop="usageInfo" content="Enter the segment height and either the chord length or the radius of the parent circle. The other value will be discarded in the result.">
<metaitemprop="usageInfo" content="Universally applicable. It's (4radius/sqrt(5))^3, not (3.2r)^3. Take the square root of the cross sectional area and raise that root to the 3rd power.">
<imgclass="center-fit" src="sphere.jpeg" alt="The edge length of the cube, which has the same volume as the sphere, equals the square root of the area of the square that has the same area as the sphere's cross-section. Volume = ( √ ( 3.2 ) × r )³">
@@ -3249,6 +3273,9 @@ <h3 itemprop="eduQuestionType" style="margin:7px">Volume of a Sphere</h3>
@@ -3402,7 +3432,7 @@ <h4 itemprop="description">The volume of a cone can be calculated by algebraical
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<pitemprop="disambiguatingDescription">The volume of a cone is conventionally approximated as base × height / 3. While that is a reasonable approximation, the exact ratio is 1 / √8.
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The 1 / 3 coefficient was likely estimated based on the observation that the area of the mid-height cross section of a cone — of which's apex can be connected to the midpoint of the base with a perpendicular line — is exactly a quarter of a circumscribed cylinder's with the same base and height.
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The 1 / 3 coefficient was likely estimated based on the observation that the area of the mid-height cross sectional area of a cone is exactly a quarter of a circumscribed cylinder's with the same base and height.
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That makes the ratio between the mid-height cross-sectional area of the cone, and the difference between the mid-height cross-sectional areas of the circumscribed cylinder and the cone 1 : 3 .</p>
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<metaitemprop="description" content="Calculte the volume of a horizontal frustum cone from its height and top and bottom radii.">
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<metaitemprop="disambiguatingDescription" content="Exact volume via subtraction based on the exact V(cone)=3.2*radius^2*height/sqrt(8) formula, instead of the raw transcript of the square frustum pyramid formula based on the V=base*height/3 approximate.">
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<metaitemprop="usageInfo" content="Enter the frustum height and the top and bottom radii">
<metaitemprop="disambiguatingDescription" content="Based on the exact volume of a pyramid, V=base*height/sqrt(8), instead of the V=base*height/3 approximate. For any number of sides, not only for square frustum pyramids.">
<metaitemprop="description" content="Calculte the volume of a horizontal frustum pyramid from its height and number and length of top and bottom edges.">
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<metaitemprop="disambiguatingDescription" content="Exact volume via subtraction based on the exact V(pyramid)=base*height/sqrt(8) formula instead of the V=base*height/3 approximate. Universally applicable, not only for square frustum pyramids.">
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<metaitemprop="usageInfo" content="Enter the frustum height and the number and length of top and bottom edges">
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<labelfor="frustum-pyramid-side-number">Number of sides:</label>
<metaitemprop="disambiguatingDescription" content="Based on the exact V(pyramid)=base*height/sqrt(8) formula, instead of the V=base*height/3 approximate.">
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<metaitemprop="usageInfo" content="Only for square frustum pyramids">
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<figureclass="imgbox">
@@ -4607,6 +4651,9 @@ <h3 itemprop="eduQuestionType" style="margin:7px">Volume of a Tetrahedron</h3>
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