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keliling = 1/2 x 22/7 x 14 x 2
kliling = 44 cm
keliling 1/2 ling.kecil (diarsir) = 1/2 x 2 x phi x r
keliling = 1/2 x 22/7 x 7 x 2
keliling = 22 cm
keliling 1/2 lingkarankecil (tdk diarsir) = 1/2 x 2 x phi x r
keliling = 1/2 x 22/7 x 7 x 2
keliling = 22 cm
jd keliling yg diarsir = 44 - 22 + 22 = 44 cm
1/2 keliling lingkaran (1) = .π.r
=. 22/7. 14
= 22/7. 14
=44
keliling lingkaran (2) = 2. π.r
= 2. 22/7.7
= 44
keliling bagian yang diarsir= kel.(1) + kel(2)
=44+44 = 88