Hitunglah keliling dan luas persegi panjang jika di ketahui A panjang 1,2 dm dan lebar 6cm B panjang 12cm dan lebar 5cm C panjang 0,25 m dan lebar 15cm

1dm = 10cm
1m = 100cm
K = 2 × (p + l)
L = p × l

A.
K = 2 × (12cm + 6cm)
K = 2 × 18cm
K = 36cm

L = 12cm x 6cm
L = 72cm²

B.
K = 2 × (12cm + 5cm)
K = 2 × 17cm
K = 34cm

L = 12cm x 5cm
L = 60cm²

C.
K = 2 × (25cm + 15cm)
K = 2 × 40cm
K = 80cm

L = 25cm x 15cm
L = 375cm²

Semoga bermanfaat.
SELAMAT BELAJAR!! ^_^