Number of Sides of Polygon equals Number of Interior Angles

Theorem

Let $A$ be a polygon.

The number of sides of $A$ is equal to the number of interior angles of $A$.

Proof

This theorem requires a proof. In particular: Obvious, which makes it difficult You can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by crafting such a proof. To discuss this page in more detail, feel free to use the talk page. When this work has been completed, you may remove this instance of {{ProofWanted}} from the code. If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): polygon}
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): polygon