perhatikan gambar diatas . jika jarak BD = 12 cm, maka panjang AC = . . . a. 14 cm b. 15 cm c. 17 cm d. 21 cm

Penyelesaian:
Diket.:
AB=15 cm
BC=13 cm
BD=12 cm
Ditanya:
AC=....?
Jawab:
AD²=AB²-BD²
AD²=15²-12²
AD²=225-144
AD²=81
AD=√81
AD=9 cm

CD²=BC²-BD²
CD²=13²-12²
CD²=169-144
CD²=25
CD=√25
CD=5 cm

AC=AD+CD
AC=9 cm+5 cm
AC=14 cm

Semoga bisa membantu...

AC = AD + DC
AD² = BA² - BD²
AD = 15²-12²
AD = 225-144
AD =
[tex] \sqrt{81} [/tex]



AD = 9

DC = BC²-BD²
DC = 169-144
DC =
[tex] \sqrt{25} [/tex]
DC = 5
AC = 9+5
AC = 14