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Angles of Polygons

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Theme:

Geometry: Properties of Polygons

Grades:

6 - 8

Subject:

Math

Duration:

45–60 minute period

Standards
& Goals:

New Jersey Core Curriculum Content Standards (8th Grade)
4.2.8 A. Geometry and Measurement – Understand and apply properties of polygons.

  • Sum of measures of interior angles of a polygon

4.3.8 D. Patterns and Algebra – Create, evaluate, and simplify algebraic expressions involving variables.
 

Note that standards in this lesson plan are for example only. This lesson can be easily adapted to meet your state's specific standards.

Objectives:

Students will:

  • Determine the sum of the measures of the interior angles of a triangle.
  • Create and evaluate a formula to find the sum of the measures of the interior angles of a polygon.
  • Write and solve equations to determine the measures interior angles of regular polygons.
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