Are the angles $\theta$ and $\alpha$ the same? link
2026-03-25 09:38:33.1774431513
Are two angles of a cone the same? If not, what is relationship between them?
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They are not the same, but related via $r$, the radius of the cone base,
$$\theta L = 2\pi r =2\pi L\sin \frac\alpha2$$
or, $$\theta = 2\pi \sin\frac\alpha2$$