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What is the area of an 100mm circle?

Updated: 4/28/2022
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Wiki User

12y ago

Best Answer

5,000 i got it right on my homework two days ago!

Formulae needed:

  1. area_circle = π x radius2
  2. radius = diameter ÷ 2
  3. circumference = 2 x π x radius ⇒ radius = circumference ÷ (2 x π)

What do you mean by a 100 mm circle?

  • Radius = 100 mm
area = π x radius2

= π x (100 mm)2

= 10000π mm2

≈ 31415.93 mm2

  • Diameter = 100 mm
radius = diameter ÷ 2

= 100 mm ÷ 2

= 50 mm

area = π x radius2

= π x (50 mm)2

= 2500π mm2

≈ 7853.98 mm2

  • Circumference = 100 mm
radius = circumference ÷ (2 x π)

= 100 mm ÷ (2 x π)

= 50/π mm

area = π x radius2

= π x (50/π mm)2

= 2500/π mm2

≈ 795.77 mm2

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12y ago
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