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= 2 x (11 + 10)
= 2 x 21
= 42 cm
Keliling 2 = 2 x ( p + l)
= 2 x (5 + 11)
= 2 x 16
= 32 cm
Keliling 3 = 2 x (p + l)
= 2 x (12 + 3)
= 2 x 15
= 30 cm
Keliling seluruhnya = 42 + 32 + 30
= 94 cm(a)
= 94 cm