98.91 is approximate to
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The regular nonagon will have 9 isosceles triangles each with 2 equal sides of 58.476088 and an apex angle of 40 degrees. Area: 0.5*58.476088^2 *sin(40)*9 = 9891 square cm rounded to the nearest whole number
swaddle
Who know maybe round and round by Selena gomez I don't know
A circle has no corners. :) It just goes round and round and round...
You could round it to 20.8, but ultimately, you should round it to 21