This website is a worksheet to estimate and measure angles. The answer sheet is there also.
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Math-Drills.com
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Explanation and examples of angles along a straight line.
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Math is Fun
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Explanation and example of angles around a point.
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Math is Fun
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This page goes through the definitions and then some practice problems for identifying them
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Homeschool Math
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A site that goes through general descriptions of angles and the types of angles, but includes additional interactive construction demonstrations.
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Hamilton's Math to Build On!
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Basic overview of supplementary angles
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Math is Fun
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Students get confused on the definitions of the different angles associated with parallel lines. This website defines them in a pictorial way and allows the students to move the lines around to see that the angles are still equal.
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Manipula Math Applet Collection
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This website has many pictures, to show all the angle types would form by parallel lines and the theorems a student should know.
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Geometry Lesson Page
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Similar triangles - all three corresponding angles the same. AAA
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Math Open Reference
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