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LAR: Yes
Title: Squares On A Triangle
Url: http://illuminations.nctm.org/Lesson.aspx?id=2517
Publisher: National Council of Teachers of Mathematics
Description: 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 relate the sides of any type of triangle, and explain how the Law of Cosines is an extension of the Pythagorean theorem. Student activity sheets are included. This material is intended for grades 9-12 and should require 2 class periods to complete.
LC Classification: Science -- Mathematics -- Algebra
Science -- Mathematics -- Geometry -- Analytic geometry -- Straight line and circle. Triangle
Science -- Mathematics -- Geometry -- Elementary geometry -- Problems, exercises, examinations
Science -- Mathematics -- Geometry -- Elementary geometry -- Special propositions, A-Z -- Pythagorean theorem
Science -- Mathematics -- Geometry -- Elementary geometry -- Study and teaching. Research
Science -- Mathematics -- Geometry -- Trigonometry
GEM Subject: Mathematics -- Instructional issues
Mathematics -- Geometry
Mathematics -- Trigonometry
Mathematics -- Algebra
Key Concept: Mathematics -- Area
Mathematics -- Cosine
Mathematics -- Triangles
Mathematics -- Algebra
Mathematics -- Pythagorean theorem
Mathematics -- Trigonometry
Mathematics -- Geometry
Key Concepts Complete: Yes
Resource Type: Instructional Materials
InteractiveResource (DCMI Type Vocabulary)
Lesson Plans
Mathematical Models
Mathematics Materials
Teaching Guides
Text (DCMI Type Vocabulary)
Worksheets
Format: html
pdf
Audience: Secondary Education
Students
Teachers
Language: English
Rights: National Council of Teachers of Mathematics
Access Rights: Free access
Date Of Record Release: 2011-01-05 03:00:01 (W3C-DTF)
Date Last Modified: 2013-12-12 10:34:37 (W3C-DTF)
Source: Scout Staff  Scout Staff
Full Record Views: 140
Resource URL Clicks: 13
Cumulative Rating: NOT YET RATED
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