Definition: The distance measured along the longest dimension of an object.

Alright class, settle down, let’s take a look! Today we’re tackling “length,” it’s quite a word, you see, And the dictionary gives us a clue for you and me. It says, "The distance measured along the longest dimension of an object," A little bit tricky, but let's make this concept correct! Think about a ruler, long and true, Measuring how far something stretches through. If you have a rectangle, tall and wide, Its length is just the longer side! Or a box, with height and width so neat, The length is the longest side, can’t be beat! It's about the space from one end to the other, you see, Following a line - that's length for me! Do you have any questions? Don't hesitate to ask, Let’s make sure this understanding truly lasts!