Respuesta :

fayecjerome

Area=

[tex]\pi \times r {}^{2} [/tex]

1)To find radius diameter/2

21.5÷2=10.75

[tex]10.75 {}^{2} \times \pi = 362.87[/tex]

area =362.87cm

2)

[tex]\pi \times 13.2 {}^{2} = 547.39[/tex]

area=547.39cm

hnori22003

a)

Area = pie × ( 21.5 / 2 )^2

Area = pie × ( 10.75 )^2

Area = pie × 115.5625

Area = 3.14 × 115.5625

Area = 362.86625 cm^2

___________________________

b)

Area = pie × ( 13.2 )^2

Area = pie × 174.24

Area = 3.14 × 174.24

Area = 547.1136 ft^2