Pada jajar genjang ABCD panjang AD = (3x-4) cm, BC = (x+10) cm dan AB =17 cm tentukan : A.nilai x B.panjang BC C.keliling ABCD
dimasrizqi11
A. x+10 = 3x-4 10+4 = 3x-x 14 = 2x x = 14/2 x = 7 cm b. BC = x+10 = 7+10 = 17 cm AD = 3x-4 = 3.7 - 4= 21-4 = 17 cm c. Kel = AB+BC+CD+DA = 17+17+17+17 = 68 cm
2 votes Thanks 1
syifachip1
A. AD=BC 3X-4=X+10 2X = 14 X = 7 B. BC= X+10 = 7+10 = 17 cm C. Keliling ABCD = AD + BC + AB + CD =17 + 17 + 17 + 17 = 68 cm
10+4 = 3x-x
14 = 2x
x = 14/2
x = 7 cm
b. BC = x+10 = 7+10 = 17 cm
AD = 3x-4 = 3.7 - 4= 21-4 = 17 cm
c. Kel = AB+BC+CD+DA
= 17+17+17+17
= 68 cm
3X-4=X+10
2X = 14
X = 7
B. BC= X+10
= 7+10
= 17 cm
C. Keliling ABCD = AD + BC + AB + CD
=17 + 17 + 17 + 17
= 68 cm