Does 1/2 of one pizza represent the same amount as 1/2 of another pizza

Answer 1

Yes, and No.

Yes, because it measures the same proportion of pizza, namely the 1/2.

No, because the overall size of both pizzas may be completely different. For example, if we have Pizza A and Pizza B, both of which are in square forms.

One side of Pizza A measures 4 inches, so the area of A is 16.

One side of Pizza B measures 6 inches, so the area of B is 36.

One half is A is 8, and one half of B is 18. So while numerically you're getting the same proportion in 1/2, the overall size of each pizza means you get more from half of Pizza B than Pizza A.