Papuss's Theorem for Surface Areas

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SUMMARY

The discussion focuses on applying Pappus's Theorem to find the surface area generated by the curve defined by the equation y=sqrt(2x+1) over the interval 0≤x≤2. The formula used is S= 2π(row)L, where 'row' represents the centroid and 'L' is the arc length. Participants highlight confusion regarding the identification of the centroid and the correct calculation of arc length, emphasizing that a graph in the xy-plane does not constitute a surface.

PREREQUISITES
  • Understanding of Pappus's Theorem for surface area calculations
  • Knowledge of arc length calculation for curves
  • Familiarity with centroid determination for curves
  • Basic calculus concepts, particularly integration
NEXT STEPS
  • Study the derivation and application of Pappus's Theorem in various contexts
  • Learn how to calculate arc length for parametric and non-parametric curves
  • Explore methods for finding centroids of curves and shapes
  • Review integration techniques relevant to surface area calculations
USEFUL FOR

Mathematics students, educators, and professionals in fields requiring geometric analysis, particularly those focused on calculus and surface area computations.

Larrytsai
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y=sqrt(2x+1), 0≤x≤2

Find the area of the surface by using the second theorem of Pappus.

S= 2pie(row)L

I cannot find what the centroid is, i have length as 2
 
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Find the area of what surface? A graph in the xy plane is not a surface. And your arc length isn't correct.
 
Last edited:

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