tentukan keliling dan luas persegi jika panjang sisinya 19 cm,28 cm,14cm

K = 4s
K = 4(19 cm)
K = 76 cm

L = s²
L = (19 cm)²
L = 361 cm²

K = 4s
K = 4(28 cm)
K = 112 cm

L = s²
L = (28 cm)²
L = 784 cm²

K = 4s
K = 4(14 cm)
K = 46 cm

L = s²
L = (14 cm)²
L = 196 cm²

sisi = 19 cm
keliling = 19 × 4 = 76 cm
luas = 19 × 19 = 361 cm2

sisi = 28 cm
keliling = 28 × 4 = 112 cm
luas = 28 × 28 = 784 cm2

sisi = 14 cm
keliling = 14 × 4 = 56 cm
luas = 14 × 14 = 196 cm2