Answer:
Area of a circle in terms of radius:
Area = π·r2 = 3.14·3.72 = 43.01 square m(*)
Area of a circle in terms of diameter:
Area = π·(d
2
)2 = 3.14·(7.4
2
)2 = 3.14·(3.7)2 = 43.01 square m(*)
Area of a circle in terms of circumference:
Area = C2
4π
= 23.252
4π
= 540.56
(4·3.14)
= 540.56
12.56
= 43.01 square m(*)
(*) 43.008403427644 m, exactly or limited to the precision of this calculator (13 decimal places).
Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.
Explanation: