Answer:
The size of Venus as viewed from the Earth relates to the Ptolemaic model as it always appears to be a crescent.
Explanation:
- Claudius Ptolemaeus was the one who had invented the Ptolemaic model back in the second century itself.
- Though the Ptolemaic model has been concluded not to be consistent with the reality of the shape or size of planet Venus, it is still considered to be an important model as it intrigued Galileo to verify whether it is the Copernican system or the Ptolemaic model that is correct.