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Help
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Once upon a time, Mr. and Mrs. Triangle had triplets. As you can imagine, they were very excited about their babies! But deciding what to name them was harder than they imagined.This delightful tale of how the Triangle Triplets got their names will solidly teach mathematicians of all ages the differences between Equilateral, Scalene, and Isosceles triangles. Never again will you have to wonder which is which!
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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support@ergodebooks.com
⚠️ California Proposition 65 Warning: Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
