# In equations involving velocity what does the triangle symbol mean?

change in

The triangle symbol is the uppercase letter delta (from the Greek
alphabet), and refers to "difference in...". For example, delta x
means how much the variable x changes between two different
positions considered.

### Why is a symbol equation more useful than a word equation?

Symbol equations generally provide more information than word equations, and can be used to calculate things such as energy gain/loss or theoretical yield. Word equations only tell us what the reactants and the products are, whereas symbol equations tell us which and how much of each element is present in the chemicals (their names may not always reflect this) and may give some indication as to their structure, which determines their chemistry. Also, symbol equations…