Proofs Without Words
Some math proofs are so clear they don’t need any explanation. Let’s look at an interesting example.
Trisection of an Angle in an Infinite Number of Steps *
This example demonstrates how to split an angle into three equal sections.
\[ \frac{1}{3}=\frac{1}{2}-\frac{1}{4}+\frac{1}{8}-\frac{1}{16}+\cdots \]
* Reference: R. B. Nelsen, Proofs Without Words, Exercises in Visual Thinking, 1993.