Split it down the middle. Using the tools of geometric construction, the video shows two different methods of constructing a 30-degree angle. The first method bisects an angle of an equilateral triangle. The second uses the diagonal of a rhombus to bisect a 60-degree angle of the rhombus.

Concepts

angle bisectors, angles, constructions, geometric constructions, rhombus

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Additional Tags

math

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Instructional Ideas

• Brainstorm different measures of angles within geometric figures

Classroom Considerations

• Individuals should have a basic understanding of geometric constructions
• Handouts contain exercises from other videos

Pros

• Verifies the measurement of the construction with a protractor
• Provides space for constructions on the worksheet

Cons

• None

Common Core

HSG-CO.D.12 MP1 MP5 MP6