91Ó°ÊÓ

Translate the following into mathematical equations. The density \(d\) of a material is directly proportional to the mass of the object \(m\) and inversely proportional to its volume \(V\).

We know that the circumference of a circle varies directly with its radius with \(2 \pi\) as the constant of proportionality. (That is, we know \(C=2 \pi r .\) ) With the help of your classmates, compile a list of other basic geometric relationships which can be seen as variations.