Question

Soal saya teman..
persegi panjang 66cm. panjang (5x-2),lebar (4x-1)cm. panjang dan lebar secara berturut-turut.. adalah. (tolong di jawab ya).

Answer 1

K = 2p + 2l
66 = 2(5 - 2) + 2(4 - 1)
66 = 10 - 4 + 8 - 2
66 = 18 - 6
66 + 6 = 18
72 = 18

cm

p = (5 - 2)
p = (5·4 - 2)
p = 20 - 2
p = 18 cm

l = (4 - 1)
l = (4·4 - 1)
l = (16 - 1)
l = 15 cm