Type:

Other

Description:

This 3 lesson instructional unit helps students investigate many different aspects of triangles including basic properties of triangles, building other shapes from triangles, the dependence of the third side length on the other two (Triangle Inequality Theorem), and the Sierpinski Triangle fractal. The lesson includes student activity sheets and links to interactive applets.

Subjects:

  • Mathematics > General
  • Education > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12

Keywords:

Process Skills,Number and Operations,NSDL,Grade 4,Grade 5,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-016,Mathematics,Patterns and Sequences,Make Use Of Structure,Upper Elementary,Fractal Geometry,Spatial Sense,Geometric Patterns,Concept Formation,Geometry,Practice Standards,Plane Geometry,Elementary School,oai:nsdl.org:2200/20120614151512068T,Geometric Sequence,Vocational/Professional Development Education,Number Patterns,Reason Quantitatively,Education,Polygons,Triangles

Language:

English

Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution Non-Commercial Share Alike

Collections:

None
Update Standards?

CCSS.Math.Content.4.G.A.2: Common Core State Standards for Mathematics

Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.

CCSS.Math.Content.4.G.A.3: Common Core State Standards for Mathematics

Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts. Identify line-symmetric figures and draw lines of symmetry.

CCSS.Math.Content.5.G.B.3: Common Core State Standards for Mathematics

Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category.

CCSS.Math.Content.5.G.B.4: Common Core State Standards for Mathematics

Classify two-dimensional figures in a hierarchy based on properties.
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