Dik : K = 20 m
p = (5x-3)
l = (3x-1)
Dit : a.) nilai x = ?
b.) panjang masing-masing sisi = ?
Jb :a.) nilai x = ?
K = 2(p+l)
20 m = 2{(5x-3)+(3x-1)}
20 m = 2{5x+3x-3-1}
20 m = 2{8x-4}
20 m = 16x - 8
16x = 20 + 8
16x = 28
x = 28/16
x = 1,75
b.) panjang masing-masing sisi = ?
p = 5x-3
= 5(1,75) - 3
= 8,75 - 3
= 5,75 m
l = 3x-1
= 3(1,75) - 1
= 5,25 - 1
= 4,25 m
:)