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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 algebra lesson from Illuminations lets students gain experience solving problems using systems of equations. The example problem provided has one solution, but multiple variations may be used to derive the answer....
This lesson from Illuminations helps illustrate recursive sequences. The interdisciplinary lesson uses elements from the short story The Devil and Daniel Webster by Stephen Vincent Benet. A mathematical game has been...
This lesson uses the example of successive discounts at a retail store to demonstrate numeric, algebraic, and graphical representations of compositions of mathematical functions. Students will get the opportunity to...
This lesson involves economics and mathematical materials. Students will use their knowledge of exponents to compute an investment's worth using a formula and a compound interest simulator. They may also use the model...

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