(August 19, 2018 at 3:46 am)Aroura Wrote: I don't see how any answer other than one is correct.
It has one hole, and 2 ends. Some holes have only one end.
How many holes does a donut have? One.
A straw is longer, and the edges are thinner, but no one would say a donut has 0 holes. And no one would say it has 2.
Aha.
But a hole is an interrupted surface. A straw is a rhombus, which means from any point on a straw, you can travel along the surface to reach any other point.