Final answer:
The active sentence 'Nobody informed me that the director had postponed the meeting' can be transformed to passive as 'I was not informed that the meeting had been postponed by the director.'
Step-by-step explanation:
The sentence 'Nobody informed me that the director had postponed the meeting' can be transformed from active voice to passive voice as follows:
I was not informed that the meeting had been postponed by the director.
Learn more about active and passive voice