“Sir Cumference and the Dragon Pi A Math Adventure” written by Cindy Neuschwander and illustrated by Wayne Geehan is a the book that was made for an age group of 8-12 year olds. The book is about This dad named Sir Cumference and his son Radius. One day Sir Cumference was really sick and needed something to cure him so he told his son Radius to get a potion. So Radius ran to the hospital and got a potion to help his father, Sir Cumference. When Sir Cumference drank the potion he turned into a DRAGON. The next day people found out and came to a conclusion that they were going to kill dragon in a a few days. Radius felt really sad and guilty. Radius had to do something and finally he found something thing that could cure him. It was called “A Circle’s Measure”. When Radius came back to his dad he measured his angles with a pie and fed him the pie and Sir Cumference turned back to a human. After that he told all the people who were going to kill the dragon (His Dad) and they came to a conclusion that if you x’s 3.14 by the diameter you get the Circumference which was named after Radius’s dad. Talking about naming after, this new measurement technique was named pi after this event. I like this story because it is a fun way to learn things about math. It would also be a great thing to read if you’re are starting to learn Pi and circle angles. In conclusion, I liked this book and it was very creative.