Is there someway to find the exact area of a blob using integrals?

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    Area Integrals
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Discussion Overview

The discussion revolves around methods for calculating the area of irregular shapes, referred to as "blobs," using integrals. Participants explore various approaches, including the use of polar coordinates and the challenges of defining boundaries for integration.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant mentions a method involving drawing lines from a central point to the edge of the blob, suggesting this could resemble a pie slice, and questions if the area can be calculated using relative integrals.
  • Another participant asserts that calculating the area is straightforward if the boundary of the blob can be expressed as integrable functions, highlighting that this is a significant challenge.
  • A follow-up post reiterates the need for integrable functions and questions how the pie slice shape affects the integration limits.
  • One participant proposes that for a pie slice, integration can be performed in polar coordinates, specifying the boundaries as radius (0, r_o) and angle (0, theta).

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of calculating the area based on the shape and boundaries of the blob, with no consensus reached on a definitive method.

Contextual Notes

The discussion highlights the complexity of defining boundaries for irregular shapes and the dependence on the specific form of the blob for integration.

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Someone told me Isaac Newton developed some infinitesimal triangle series to find the area of a random blob, but I think there might be some way to do it this way by drawing many lines from a central point to the edge, although that would make more of a pie slice, but is there some way to calculate the area of that pie slice using relative integrals?
 
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Yes, it is simple if you can write the boundary of the "blob" in terms of integrable functions! That's the hard part.
 
HallsofIvy said:
Yes, it is simple if you can write the boundary of the "blob" in terms of integrable functions! That's the hard part.

But what about it being in the shape of a pie slice? The range is just from x1 to x1?
 
A pie slice would be simple. You integrate in polar coordinates over the radius and angle. The boundaries are then (assuming a normal slice of pie): radius (0,r_o) and angle (0, theta)
 

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