The More You Know ★
The More You Know ★
Out of context: Reply #1372
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- imbecile2
re: https://qbn.com/reply/4103219/
Let's say we have a circle with a radius r centered at the origin. The equation of the circle is
from which we get
The area of the circle is
Thus, one third of the area is
To find the x-value where we place the first vertical line (starting from the center of the circle and moving outward), we want to find x such that the area from the y-axis to x is one third of the circle's area.Using the formula for the area of a segment:
We set this equal to
From this equation, we can solve for x to determine the point at which to place the first vertical line to trisect the circle by area. The second vertical line would be its reflection across the y-axis since the circle is symmetric.This is a transcendental equation. A closed-form solution in terms of elementary functions is not possible, so a numerical method like the Newton-Raphson method is typically used to approximate x.
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