Panjang sisi suatu persegi adalah (10-x) cm keliling persegi tersebut 28cm . tentukanlah nilai x dan panjang sisi persegi tersebut, pliss tolong dijawab yaaa!
Avicennaa
Keliling = 4 x s 28 = 4 ( 10 - x) 28 = 40 - 4x 28 - 40 = - 4x -12 = - 4x x = 3 panjang sisi = ( 10 - x ) = ( 10 - 3) = 7
28 = 4 ( 10 - x)
28 = 40 - 4x
28 - 40 = - 4x
-12 = - 4x
x = 3
panjang sisi = ( 10 - x )
= ( 10 - 3)
= 7
28 = 4.(10-x)
28 = 40-4x
28-40 = -4x
-12 = -4x
x = 12/4
x = 3 cm
jadi, p.sisi = 10-x = 10-3 = 7 cm