panjang YX adalah...

Mapel : Matematika
Bab : Kesebangunan

XY = CD x BY + AB x CY / BC
      = 7 cm x 10 cm + 15 cm x 6 cm / 6 cm + 10 cm
      = 70 cm² + 90 cm² / 16 cm
      = 160 cm² / 16 cm
      = 10 cm