Practice problem
Which of the following expressions (if any) are equal to π\piπ?
circumferenceradius\frac{circumference}{radius}radiuscircumference
circumferencediameter\frac{circumference}{diameter}diametercircumference
areadiameter\frac{area}{diameter}diameterarea
arearadius2\frac{area}{radius^2}radius2area
Type a concept, like “slope” or “photosynthesis”.
