Suatu persegi panjangnya kelilingnya 32 cm. jika panjangnya 10 cm, maka lebarnya

Jawaban:

k = 32 cm

p = 10 cm

• Cari lebar

k = 2 ( p + l )

32 = 2 ( 10 + l )

32 = 20 + 2l

32 – 20 = 2l

12 = 2l

6 = l

lebar = 6 cm