Etty Wanda and the Have a Heart Problem - Reflect and Discuss
October 2006, Volume 13, Issue 3, Page 148
This article includes a fictional story featuring Etty Wanda, a girl who likes to point out mathematical errors, and Mrs. Grey, an evil sorceress who poses a paradoxical math problem that asks about comparing area with perimeter.
Problem Solving / Problem Posing
Perimeter / Circumference
Reasoning and Proof