Question

Berdasarkan gambar diatas tentukan
a. panjang AC
b.panjang CF
c.panjang AE
d.luas segitiga ADF

Answer 1

Jawaban terlampir pada gambar berikut

Answer 2

BC = AD = 8 mDC = AB = 6 m
AC = √(BC² + DC²)
AC = √(8² + 6²)
 AC = √(64 + 36) = √100
AC = 10

luas segitiga DCA = 1/2 . AD. DC
1/2 . AC . DF = 1/2 . AD . DC
AC . DF = AD . DC
10 . DF = 8 . 6
DF = 48/10
DF = 4,8 m


CF = AE = √(6² - 4,8²)
= √(36 - 23,04) = √12,96
= 3,6 m


DF = AC - CF = 10 - 3,6 = 6,4
Luas ADF = 1/2 . DF . AF= 1/2 . 4,8 . 6,4= 15,36 m²