Proof Without Words: Squares and Primes

Author:: Roy Wright

Topic:: Square

A proof without words: When you take 1 away from a square number, you will never get a prime number. Well, almost never. (The green dot in the lower right can be dragged.)

New Resources

Oriented Angles and the Unit Circle
Art and Rotational Symmetry
Kopie von parabel - parabol
Roman Numerals Bingo
Flag in the wind

Discover Resources

happy_new_year
rotations page 4
Daniel Fuller
Arc Lengths
Parametrico T-shirts

Discover Topics

Hyperbola
Normal Distribution
Real Numbers
Poisson Distribution
Quadrilaterals