SS6.3
Demonstrate understanding of regular and irregular polygons including:
  • classifying types of triangles
  • comparing side lengths
  • comparing angle measures
  • differentiating between regular and irregular polygons
  • analyzing for congruence.

[C, CN, R, V]

Indicators for this outcome
(a)

Observe examples of polygons, including triangles, found in situations relevant to self, family, or community and sort the polygons into irregular and regular polygons.

(b)

Analyze the types of triangles (scalene, isosceles, equilateral, right, obtuse, and acute) to determine which, if any, represent regular polygons.

(c)

Compare two regular polygons (using superimposing or measuring) to determine whether or not the two polygons are congruent.

(d)

Analyze a set of regular polygons and a set of irregular polygons to identify the characteristics of regular polygons.

(e)

Critique the following statement: "When viewed from different perspectives, the same triangle can be classified in different ways."

(f)

Draw and classify examples of different types of triangles (scalene, isosceles, equilateral, right, obtuse, and acute) and explain the reasoning.

(g)

Replicate a polygon in a different orientation and informally prove that the new polygon is congruent and explain the reasoning.

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