This website will lay out the names of polygons according to the number of sides.
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AAA Math
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A simple interactive website that shows the 6 different classifications of triangles: right, acute, obtuse, equilateral, isosceles, and scalene.
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Math.com
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The page starts with an explanation of how the protractor works. The student is then given a series of 10 angles to measure with a virtual protractor. The site checks the students answer.
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Math Playground
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This website explains the theorem that the sum of two sides of a triangle must be longer than the third side. It also includes a video.
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Online Math Learning
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Estimate the angles between your fingers when you expand your hand.
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Figure This! Math Challenges for Families (NCTM)
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Gives illustrations of the most basic and the most complex polyhedra
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Cool Math 4 kids
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Gives descriptions of tessallations
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CoolMath4Kids
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This page gives a very easy formula for finding the interior angles of any polygon, and goes through the steps to understand why this formula works as well. An excellent, understandable site.
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Cool Math
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