Diketahui persegi panjang ABCD dengan panjang diagonal AC=(7x - 3) cm dan BD=(4x + 6) cm. Panjang diagonal AC adalah..

MAPEL = MATEMATIKA
KELAS = 7
BAB = SPLSV

diketahui :
AC = (7x - 3)cm
BD = (4x + 6)cm

ditanya = diagonal AC ??

7x - 3 = 4x + 6
7x - 4x = 6 + 3
3x = 9
x = 9/3
x = 3

diagonal AC :
= ( 7x - 3 ) cm
= ( 7(3) - 3 ) cm
= ( 21 - 3 ) cm
= 18cm

jadi, panjang diagonal AC = 18cm
semoga membantu

7x-3 = 4x+6 7x-4x=3+6 3x = 9 x = 3 AC = 7 x 3-3 = 18