- Definition
The Pythagorean theorem is a rule that helps us find the length of a missing side in a special triangle called a right-angle triangle (a triangle with one square corner). It says that if you square the two shorter sides and add them together, you'll get the same number as when you square the longest side.
Pythagorean theorem is a term used in Ontario’s Kindergarten to Grade 8 curriculum.
The descriptions on this page are SmartStudy’s own original, plain-language writing — not the Ministry’s wording. They are aligned to the Ontario Curriculum, © King’s Printer for Ontario. For the Ministry’s official wording, see the source link below. SmartStudy is an independent service and is not affiliated with, endorsed by, or sponsored by the Government of Ontario or the Ministry of Education. Ontario Curriculum and Resources ↗