larger image ## Polygons (Elementary and Middle School Version)## $4.95Our
Polygons (Elementary and Middle School Version) Quick Reference Guide explains the following concepts:
- The definition of a polygon
- Classifying polygons according to the number of sides (using words such as
*triangle*and*pentagon*) - Classifying polygons as regular or irregular and as concave or convex
- Classifying quadrilaterals using the terms
*parallelogram, rectangle, rhombus, kite,*and*trapezoid* - Classifying triangles using the terms
*scalene triangle, isosceles triangle, equilateral triangle, acute triangle, right triangle,*and*obtuse triangle* - The Sum of the Measures of the Angles of a Triangle Theorem
- The Isosceles Triangle Theorem and its converse
- The Pythagorean Theorem and its converse
- The formulas we use to find the areas of quadrilaterals, triangles, and circles
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