" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Diket
k = 40 cm
p - l = 4 cm → l = p - 4
Ditanya
Luas persegi panjang
Penyelesaian
K = 40
2(p + l) = 40
2((p + (p -4)) = 40
2(2p - 4) = 40
4p - 8 = 40
4p = 40 + 8
p = 48
p = 48/4
p = 12
maka
l = 12 - 4
l = 8
sehingga luasnya
L = p × l
L = 12 × 8
L = 96
jadi luasnya adalah 96 cm²
***********************************************
Kelas : 7
Mapel : Matematika
Bab : PLSV
Kata kunci : persegi panjang, luas, keliling