# Classifying Triangles

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 Circumcircle of a triangle. Definition and properties with interactive applet. Math Open Reference An overview of the various centers of a triangle Math Open Reference Demonstration that a triangle with fixed perimeter does not have a constant area. Math Open Reference Trinagles can be classified according to sides and angles Math Open Reference The conventional method of calculating the area of a triangle (half base times altitude) with pointers to other methods and special formula for equilateral triangles Math Open Reference Worksheet to practice classifying triangles as scalene, isosceles, or equilateral. Helping with Math In this Early Edge video lesson, you'll learn more about Triangles: Perimeter and Area, so you can be successful when you take on high-school Math & Geometry. The Princeton Review In this Early Edge video lesson, you'll learn more about Complementary and Supplementary Angles, so you can be successful when you take on high-school Math & Geometry. The Princeton Review In this Early Edge video lesson, you'll learn more about Types of Angles, so you can be successful when you take on high-school Math & Geometry. The Princeton Review The worksheets below can be used as part of extra math homework. These geometry worksheets are free and easily printable. They cover typical school work from grade 4 through 8. They include questions on polygons, 3D objects, angles, and calculations of area, volume, etc. Helping With Math.com
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