The Asked & Answered department shares excerpts from discussion threads on the online MyNCTM community. In this issue, featured threads highlight responses to members' questions regarding 1st grade number sense, multiplication and division of fractions, issues of definition and precision related to circles, and the value of rationalizing denominators.
Excerpts from discussion threads on the online MyNCTM community
Each month Asked & Answered highlights selected threads from the MyNCTM community. MyNCTM is an online community where NCTM members can ask questions, start and join discussions, and interact with education experts. We encourage you to join the conversation at https://my.nctm.org.
Editor's Context Although the responses to this question focus on the geometry of circles, the responses also illustrate the importance of definition in geometry. The key terms that need to be clearly defined to answer this question are circle, polygon, side, edge, and vertex. Here are a few select responses that highlight this issue.