Vertices?

How many vertices does each shape have? How many sides?

(Triangle, Rectangle, and Circle)

This was the first question on Brittney's homework yesterday. Six pages of homework. First question I was like what the heck is a vertices. I had no clue.

Brittney had already answered the sides question but she didnt know what a vertices was either.

My guess was where a point was made, but I wasn't sure.

So to the dictionary I went......
(in mathematics) the point where two lines meet to form an angle, or the point that is opposite the base of a shape.

So I got my answer, but what does it say about the rest of the year that I had to dig out the dictionary on day one of second grade.