Answer:
The area of a circle with radius 11 is 380.1
Step-by-step explanation:
Solution Steps:
Area of a circle in terms of radius:
Area = π·r2 = 3.14·112 = 380.1 square cm(*)
Area of a circle in terms of diameter:
Area = π·(d
2
)2 = 3.14·(22
)2 = 3.14·(11)2 = 380.1 square cm(*)
Area of a circle in terms of circumference:
Area = C2
4π
= 69.122
= 4777.57
(4·3.14)
12.56
= 380.1 square cm(*)
(*) 380.13271108436 cm, 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.
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Answer:
The area of a circle with radius 11 is 380.1
Step-by-step explanation:
Solution Steps:
Area of a circle in terms of radius:
Area = π·r2 = 3.14·112 = 380.1 square cm(*)
Area of a circle in terms of diameter:
Area = π·(d
2
)2 = 3.14·(22
2
)2 = 3.14·(11)2 = 380.1 square cm(*)
Area of a circle in terms of circumference:
Area = C2
4π
= 69.122
4π
= 4777.57
(4·3.14)
= 4777.57
12.56
= 380.1 square cm(*)
(*) 380.13271108436 cm, 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.