Respuesta :
If D is on segment SF then |SD| + |DF| = |SF|.
We have:
|SF| = 72 cm
|DF| = 62 cm
substitute:
|SD| + 62 cm = 72 cm |-62 cm
|SD| = 10 cm
We have:
|SF| = 72 cm
|DF| = 62 cm
substitute:
|SD| + 62 cm = 72 cm |-62 cm
|SD| = 10 cm