i used to think that a hypotenuse was some kind of animal related to a hippopotamus, until we learned about them in math in 8th grade.
A childhood belief about general

others believed things like this
- I used to believe that all my aunts were related to my mother and all my uncles were related to my father.— Mandy
- I learned in the first grade that the Sun was a star just like all the other stars, only it was MUCH bigger.— Geoff
- I used to believe that 7 times 12 was equal to 83 or 84, depending on the math problem.— Eric Swensen
- When I was a child, I used to think that if you eat an animal, you become that animal
— Hmza - I used to believe that people with the same first name were related.— Rebecca
- I used to think that all people with the same FIRST name were related.— Lisa