Pie charts are terrible
Pie charts are notoriously terrible for data visualization. Humans are genuinely bad at comparing angles. Thus, the only reason one should ever use a pie chart is to make beautiful pie-chart-art.
par(mar = c(0, 1, 0, 1))
pie(
c(280, 60, 20),
c('Sky', 'Sunny side of pyramid', 'Shady side of pyramid'),
col = c('#0292D8', '#F7EA39', '#C4B632'),
init.angle = -50, border = NA
)

Figure 1: Pyramid pie chart art.
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