jawab yg D carilah nilai T menggunakan rumus dalil pythagoras

AC = 30 cm
OA = AC / 2
      = 30 cm / 2
      = 15 cm

BD = 16 cm
OB = BD / 2
      = 16 cm / 2
      = 8 cm

t² = OA² + OB²
t² = 15² + 8²
t² = 225 + 64
t² = 289
t = √289
t = 17 cm