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# Classifying Polygons by Sides

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Geometry Definitions and Introduction to Proof

Word Problem--Solve for the Side of a Regular Polygon.
Teacher Contributed
The lengths of two sides of a regular enneagon are represented by the expressions (9x+15)$(9x + 15)$ and (11x+9)$(11x + 9)$. What is the length of one side of the enneagon?
qid: 100104