Question

Keliling persegi panjang 34cm dan diagonalnya 13cm brapa ukuran persegi panjang trsebut?

Answer 1

Panjang 12cm x lebar 5cm

Answer 2

P + l = 34/2
= 17
p^2 + l^2 = 13^2
(p+l)^2 - 2pl = 13^2
(17)^2 - 2pl = 13^2
2pl = 17^2 -13^2
= (17-13)(17+13)
= 4 x 30
= 120
pl = 120/2
= 60
p + l = 17
p = 17-l
pl = 60
(17-l)l = 60
17l - l^2 =60
l^2 - 17l +60 =0
(l - 12)(l -5)=0
l= 12 atai l=5

jd p=12 da l=5