Kak fandy tolong bantu

Jari jari besar = 14/2 = 7 cm

Jari jari kecil = 7/2 = 3,5 cm


Luas arsiran :
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= L. ½ besar - L. Kecil

= 1/2 ( π x r²) - ( π x r²)

= ½ (22/7 x 7²) - (22/7 x 3,5²)

= ½ (154) - (38,5)

= 115,5 cm²



Keliling Lingkaran :
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= K. ½Besar + K. Kecil

= (π x r) + (2 x π x r)

= (22/7 x 7) + (2 x 22/7 x 3,5)

= 22 + (44/7 x 3,5)

= 22 + 22

= 44 cm✔