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= 1/2 × 22/7 × 7
= 1/2 × 22
= 11 cm
Jadi keliling seluruhnya = 15 + 15 + 5 + 5 + 11 = 51 cm
kalau keliling tinggal ditambah semua
Maaf kalau ada kesalahan :)
Keliling = 15+5+11+5+15 = 51cm