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Area = pi*r2 = 3.14*242 approx = 1808.64 square units.
Area = 1/4*Pi*d2 = 0.25*3.14*242 = about 452.16m2
Area = Pi x radius2. Therefore, your sum is 3.1415927 x 242 = 1809.56 (rounded to 2 decimal places).
62.22539674
If you take pi as 22/7 the the circumference is 242 cm.