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```4.G.2
2011
Domain: Geometry
Cluster: Draw and identify lines and angles, and classify shapes by properties of their lines and angles.
Standards: 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.
Essential Questions
-How do you classify a
two-dimensional figure?
Content Statements
- Students will learn to
identify polygons.
- Students will learn to
identify and classify
triangles
- Students will learn to
- Students will solve
problems by making and
testing generalizations.
Assessments
Enduring Understandings
- Two- dimensional or plane
shapes have many properties that
make them different from one
another. Polygons can be
described and classified by their
sides and angles.
- Two-dimensional or plane
shapes have many properties that
make them different from one
another. Polygons can be
described and classified by their
sides and angles.
- Two-dimensional or plane
shapes have many properties that
make them different from one
another. Polygons can be
described and classified by their
sides.
- Commonalities in attributes of
objects or situations can be found
and used to make generalizations
Activities, Investigation, and Student Experiences
Students will sort two-dimensional figures based on parallelism,
perpendicularity, and angle types using a Venn Diagram.
Students will draw quadrilaterals with diagonals. Students will
investigate parallel or perpendicular lines and right triangles.
Given specified criteria students will draw the figure. (example:
a parallelogram with one right angle; a quadrilateral with one
pair of parallel sides.)
4.G.2
-Series Assessments
2011
–Teacher Observation
-Open-ended word problems
Equipment Needed: Math manipulatives, available
technology, pencil, paper.
Teacher Resources:
Series Textbook
Supplemental Worksheets
individual skills across the math curriculum
http://www.homeschoolmath.net/teaching/g/parallel_and_perpe
ndicular.php a lesson plan on parallel and perpendicular lines
http://www.mathsisfun.com/triangle.html classifying triangles
http://www.internet4classrooms.com/skill_builders/geometry_m