Laugh and learn with fun facts about the history of pi, measurements, theorems, and more—all told in Dr. Seuss’s beloved rhyming style and starring the Cat in the Hat!

“It is all about circles and measuring fun. So put on your Pi Hats! Let’s start, everyone!”

The Cat in the Hat’s Learning Library series combines beloved characters, engaging rhymes, and Seussian illustrations to introduce children to non-fiction topics from the real world! Go on an adventure with the Cat in the Hat and learn:

• how to measure and draw circles
• how pi is a number so long that it never ends
• how Ancient Egyptians used pi to help build the pyramids
• and much more!

Perfect for story time and for the youngest readers, Happy Pi Day to You! All About Measuring Circles also includes an index, glossary, and suggestions for further learning.

Look for more books in the Cat in the Hat’s Learning Library series!
High? Low? Where Did It Go? All About Animal Camouflage
Is a Camel a Mammal? All About Mammals
The 100 Hats of the Cat in the Hat: A Celebration of the 100th Day of School
A Great Day for Pup: All About Wild Babies
Would You Rather Be a Pollywog? All About Pond Life
I Can Name 50 Trees Today! All About Trees
Fine Feathered Friends: All About Birds
My, Oh My--A Butterfly! All About Butterflies
Oh Say Can You Seed? All About Flowering Plants
Inside Your Outside! All About the Human Body
Ice is Nice! All About the North and South Poles

Join the Cat in the Hat as he explains how to measure circles and calculate pi in this perfect choice for Pi Day celebrations and nurturing a love of math and numbers!

The Cat in the Hat makes calculating pi-one of the most fascinating numbers in mathematics-as easy as pie! Using a piece of string and two sticks, the Cat first shows beginning readers how to draw a perfect circle. Then, using a can and a piece of ribbon, he shows how to measure a circle's circumference and diameter, and to use those measurements to calculate pi. Also included is information about the history of measurement and famous Pi Pioneers!

Written in simple rhyme, Happy Pi Day is a natural choice for celebrating Pi Day (held annually on March 14), and for nurturing a child's interest in math. Fans of the hit PBS show The Cat in the Hat Knows a Lot About That! will be delighted at this new addition to the Learning Library series.