Ohio Resource Center
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Law of Sines and Law of Cosines 1: Law of Sines
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ORC# 7726
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?id=L703
Resource Type: Lessons
Discipline: Mathematics
Grades: Grades 9–12
Professional Commentary: Students use right triangle trigonometry to develop the law of sines. An activity sheet, discussion questions, lesson extensions, and suggestions for assessment are included....
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Law of Sines and Law of Cosines 2: Law of Cosines
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ORC# 7725
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=L704
Resource Type: Lessons
Discipline: Mathematics
Grades: Grades 9–12
Professional Commentary: Students use right triangle trigonometry and the Pythagorean theorem to develop the law of cosines. An activity sheet, discussion questions, lesson extensions, and suggestions for assessment are included....
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Sine Law by Discovery: Direct Variation and Triangles
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ORC# 10176
Resource Information
Resource URL: http://www.ohiorc.org/pm/math/richproblemmath.aspx?pmrid=42
Resource Type: Content Supports -- Activities and rich problems
Discipline: Mathematics
Grades: Grades 10–12
Professional Commentary: Through guided discovery, students revisit the notion of two quantities x, y being directly proportional if they are related by a constant ratio y/x = k. This concept is reviewed through applications that confirm that a graph of directly varying quantities satisfies the form y = kx....
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