Tolong nomor 52 dan pake cara ya

Panjang BC = BD - CD = 6 3/4 - 3 1/8 = 6 6/8 - 3 1/8 = 3 5/8 cm
Panjang AB = AD - BD = 12 4/5 - 6 3/4 = 12 16/20 - 6 15/20 = 6 1/20 cm

semoga membantu :)