Question

Radius of circle =10.5cm find its area

Answer 1

Answer:

346.4

Step-by-step explanation:

Area of a circle in terms of radius:

Area = π·r2 = 3.14·10.52 = 346.4 square cm(*)

Area of a circle in terms of diameter:

Area = π·(d2)2 = 3.14·(212)2 = 3.14·(10.5)2 = 346.4 square cm(*)

Area of a circle in terms of circumference:

Area = C24π = 65.9724π = 4352.04(4·3.14) = 4352.0412.56 = 346.4

Answer 2

Answer:

$area \: of \: circle \: = π {r}^{2}$

$\frac{22}{7} \times 10.5 \times 10.5$

$346.5 {cm}^{2}$