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Title: Reflect on This
Url: https://www.nctm.org/Classroom-Resources/Illuminations/Lessons/Reflect...
Publisher: National Council of Teachers of Mathematics
Description: This geometry lesson from Illuminations examines regular polygons. Students will study reflections using hinged mirrors and examine the interior angles of regular polygons. The lesson allows students to look at the relationship between the number of sides in a regular polygon and the measure of its central angles. An animated video demonstrating the experiment is included with the lesson. The lesson is intended for grades 9-12 studying geometry and should take two class periods to complete.
LC Classification: Science -- Mathematics -- Geometry -- Elementary geometry -- Study and teaching. Research
Science -- Mathematics -- Geometry -- Special topics in plane geometry -- Straight lines, angles, triangles, etc.
Science -- Physics -- Optics. Light -- Geometrical optics -- Lens and mirror systems
Science -- Physics -- Optics. Light -- Optical instruments and apparatus (General) -- Special instruments, A-Z -- Kaleidoscopes
GEM Subject: Mathematics -- Instructional issues
Mathematics -- Geometry
Key Concept: Mathematics -- Angles
Mathematics -- Polygons
Mathematics -- Geometry
Resource Type: Instructional Material
Instructional Material -- Model
Audio/Visual -- Movie/Animation
Instructional Material -- Demonstration
Instructional Material -- Lesson/Lesson Plan
Instructional Material -- Interactive Simulation
Instructional Material -- Instructor Guide/Manual
Format: Document -- PDF
Document -- HTML
Video -- Quicktime
Audience: Educator
Learner
Education Level: High School
Language: English
Rights: National Council of Teachers of Mathematics
Access Rights: Free access
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Source: Scout Staff
Full Record Views: 5
Resource URL Clicks: 10
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