This Educational Solutions video from 2010 demonstrates the Pythagorean Theorem with the throwback vibes of a Sesame Street stop-motion animation from the 1970s. It’s set to an electronic instrumental titled Popcorn, which was first recorded in 1969.
Watch as white paper squares assemble along the sides of a right triangle, regroup into three squares of different sizes, and reorganize again into two equal squares.
The stop-motion paper pixels are demonstrating Pythagoras’ theorem, a fundamental principle in geometry that applies to right-angled triangles. The theorem states that in a right triangle, the square of the length of the hypotenuse (side C) is equal to the sum of the squares of the lengths of the other two sides (A and B). The geometric formula is expressed as a² + b² = c².
This theorem is widely used to calculate the length of any one side of a right triangle if the lengths of the other two sides are known, and it’s more easily understood with visual demonstrations.
Watch this next: The Pythagorean theorem water demo.