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This set of videos, created by Salman Kahn of the Kahn Academy, focus on trigonometry. Watch the "Geometry" playlist first if you have trouble understanding the topics covered here, it will certainly be a useful aid. ...
This math lesson from Illuminations uses squares to represent equivalences involving square and cuberoots. Students will be able to make and test theories of connections between geometric and numeric representations...
This lesson will help students understand the law of cosines and the Pythagorean theorem. The material has students find out whether a triangle is acute, obtuse, or right; determine a formula for the law of cosines to...
This interdisciplinary lesson uses musical terms and concepts to teach algebra and geometry. Students will analyze musical scales and frequencies generated by a geometric sequence, and relate sine waves to musical...
This geometry lesson from Illuminations investigates translations and their properties. The material will help students understand how translations work and what happens when two or more translations are applied one...

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