MA19.5.21

Mathematics (2019) Grade(s): 5

MA19.5.21

Classify triangles according to side length (isosceles, equilateral, scalene) and angle measure (acute, obtuse, right, equiangular).

Unpacked Content

Knowledge

Students know:
  • Measurable attributes of triangles include length of side and angle measures.
  • Appropriate tools and units of measure for length of side and angle measures.

Skills

Students are able to:
  • Classify triangles according to side measures and angle measures.

Understanding

Students understand that:
  • triangles can be described and classified by their properties of side length, angle size, or cross-classify to include both side length and angle size.

Vocabulary

  • Classify
  • Polygon
  • Side measure
  • Angle measure
  • Isosceles
  • Equilateral
  • Scalene
  • Acute
  • Obtuse
  • Right
  • Equiangular

Aligned Learning Resources

Anne of Green Gables: The Great American Read
2D Shape Classification
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