Page 38 - Modul Bangun Datar Segi Empat_Neat
P. 38
Ditanya : nilai x ?
Jawab :
L =
2
2
48 = 8 ( + 2)
2
48 = 4 (x + 2)
48 = 4x + 8
4x = 48 – 8
4x = 40
x = = 10
2
5. Diketahui : luas = 300 cm
AC = 24 cm
BC = 20 cm = AB
Ditanya : AD ?
Jawab :
L = × d × d 2
1
2
L = × AC x BD
2
300 = × 24 x BD
2
300 = 12
BD = = 25
2
AO = OC = = 24 = 12
2 2
OB = −
2
2
2
= √20 − 12 = 400 − 144 = 256 = 16
2
36
Bangun Datar Segi Empat - VII
