lengkapi tabel berikut jika diketahui ukuran berikut terdapat pada bangun persegi panjang.#C & E sj *tlg & mhn jwbn-nya*

Keliling = 2(panjang + lebar)
Luas = panjang × lebar

a. K = 2(8 + 6) = 2 × 14 = 28 cm
L = 8 × 6 = 48 cm2

b. 42 = 2(12 + l)
42 = 24 + 2l
18 = 2l
l = 9 cm
L = 12 × 9 = 108 cm2

c. K = 2(15 + 12) = 2 × 27 = 54 cm
L = 15 × 12 = 180 cm2

d. 228 = 19 × l
l = 12 cm
K = 2(19 + 12) = 2 × 31 = 62 cm