Cardioid Area Calculator


About Cardioid Area Calculator (Formula)

Sure, I’d be happy to explain the formula and concept behind calculating the area of a cardioid.

A cardioid is a geometric shape that resembles a heart or a droplet. It’s a type of mathematical curve that is defined by a specific parametric equation. The general parametric equations for a cardioid are:

x = a(1 – cos(θ)) y = a sin(θ)


  • (x, y) are the coordinates of a point on the cardioid.
  • θ (theta) is the parameter that varies from 0 to 2π radians (or 0 to 360 degrees), determining the position on the curve.
  • ‘a’ is a constant that scales the size of the cardioid.

To calculate the area enclosed by a single loop of the cardioid, you can use calculus and integration. The formula for the area ‘A’ of a cardioid is given by:

A = ∫[0 to 2π] 0.5 * y^2 dθ

Substitute the value of ‘y’ from the parametric equation into the formula:

A = ∫[0 to 2π] 0.5 * (a sin(θ))^2 dθ

Simplify and solve the integral:

A = ∫[0 to 2π] 0.5 * a^2 * sin^2(θ) dθ A = 0.5 * a^2 * ∫[0 to 2π] (1 – cos(2θ)) / 2 dθ A = 0.5 * a^2 * [θ – 0.5 * sin(2θ)] |[0 to 2π] A = 0.5 * a^2 * [2π – 0 – (0 – 0)] A = π * a^2

So, the formula for the area ‘A’ of a cardioid is:

A = π * a^2

This formula gives you the area of the entire single loop of the cardioid. If you have a cardioid with multiple loops, you would need to adjust the limits of integration accordingly to cover the relevant portion of the curve.

Remember that ‘a’ is the scaling factor that affects the size of the cardioid. The larger the value of ‘a’, the larger the cardioid, and consequently, the larger its area.

This formula is derived using calculus and integration techniques. If you’re not familiar with these concepts, it might seem a bit complex, but it’s a fundamental way to calculate the area of irregular shapes defined by parametric equations like the cardioid.

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