Sir Cumference and the Great Knight of Angleland: A Math Adventure by Cindy Newschwander is indeed a math adventure. There are several books in the series, but this one tackles the topic of circles. Join Radar on his quest to achieve knighthood, passing a variety of math-related challenges to unlock the secret of the circle medallion. On his way to knighthood, he has to travel to the Obtuse Mountain, discovering angles and the number of degrees in a circle.
I love the Sir Cumference books!and your blog is fun and really matches you!
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