Question

Tolong dijawab nomor 3 dan 4 dengan benar yaa jgn asal² an jangan jawab kau tidak tau!

Answer 1

Nomor 3
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Luas yg diarsir = 1/4 x luas lingkaran
= 1/4 x phi x r^2
= 1/4 x phi x 16^2
= 1/4 x phi x 16 x 16
= 64 phi cm^2

Nomor 4
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Keliling yg diarsir = keliling 1/2 lingkaran + OA + OB
= (1/2 x phi x 2r) + OA + OB
= (1/2 x phi x 2.20) + 20 + 20
= (1/2 x phi x 40) + 40
= ( 20 phi ) + 40
= (20 x 3,14) + 40
= 62,8 + 40
= 102,8 cm