The exact area = pi*32 or 9*pi square cm
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A ≈ 28.27cm2
approximately 28.26 cm2
You said "diameter", so we'll assume that you're talking about a circle.Circumference of a circle (distance around, 'perimeter') = (pi) x diameter = 6 pi = 18.85 cm (rounded)Area of a circle = (pi) R2 = (pi) x (1/2 of the diameter)2 = 9 pi = 28.27 cm2 (rounded)
A cylinder with a height of 7cm and a diameter of 6cm has a surface area of 188.5cm2
C = ~37.7 cm A = ~113.1 cm2