brizeidyfigueroa24 brizeidyfigueroa24
  • 13-08-2020
  • Mathematics
contestada

the area of a circle with (a) a radius of 9.2 centimeters and (b) a diameter of 50.5 inches.

Respuesta :

PunIntended
PunIntended PunIntended
  • 13-08-2020

Answer:

(a) 57.8 cm²

(b) 158.7 in²

Step-by-step explanation:

(a)

The area of a circle is denoted by A = 2πr, where r is the radius.

Here the radius is r = 9.2, so plug this in:

A = 2πr

A = 2π * 9.2 ≈ 57.8 cm²

(b)

The diameter is twice the radius, so since the diameter is 50.5 inches, the radius will be 50.5/2 = 25.25 inches.

Plug this into the formula:

A = 2πr

A = 2π * 25.25 ≈ 158.7 in²

~ an aesthetics lover

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