Cari akan jawaban no11 pakai cara

Kel = 2(3x-1) + 2(x+6)

66 = 6x – 2 + 2x + 12

66 = 8x + 10

8x = 66 – 10

x = 56/8

x = 7

panjang CD = AB

maka,

CD = 3x – 1

= 3(7) – 1

= 21 – 1

= 20

panjang AD = BC

maka,

AD = x + 6

= 7 + 6

= 13

Jawaban : B