Answer to Friday’s problem, regarding the number of diagonals that can be drawn in any convex polygon.

# Tag Archives: Diagonals

# Challenge Problem – Polygon Diagonal Formula

Polygons have diagonals. There is a formula for the number of diagonals that a polygon has. For a challenge, find the algebraic formula that governs how many diagonals there are in any convex polygon with n sides. Good luck!

# Tutor Tales #1: Color in Geometry

High school geometry can have all kinds of tricky problems. But if you use different colors when you set up the problem you can often make a tough problem much easier. Here’s an example of how using color helped a girl find the total number of diagonals in a regular convex nonagon.