<Ul> <Li> Legislation </Li> <Li> Pi Day </Li> </Ul> <Tr> <Th> Related topics </Th> </Tr> <Tr> <Td> <Ul> <Li> Squaring the circle </Li> <Li> Basel problem </Li> <Li> Six nines in π </Li> <Li> Other topics related to π </Li> </Ul> </Td> </Tr> <Ul> <Li> Squaring the circle </Li> <Li> Basel problem </Li> <Li> Six nines in π </Li> <Li> Other topics related to π </Li> </Ul>

What does the area of a circle mean