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- 4.G.A.1Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.
- 4.G.A.2Classify 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.
- 4.G.A.3Recognize 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.

Classification of Quadrilaterals

4th Grade Math

Â» Unit:

Geometry

Big Idea:Students will investigate and classify quadrilaterals by their properties.

Regular vs. Irregular Polygons

4th Grade Math

Â» Unit:

Geometry

Big Idea:Students will complete a powerpoint presentation and will explore the difference between regular and irregular polygons.

Math Foldables - Geometry Assessment

4th Grade Math

Â» Unit:

Geometry

Big Idea:Foldables are alternative ways to assess students in math.

Classification of Triangles

4th Grade Math

Â» Unit:

Geometry

Big Idea:Students will use a Powerpoint Presentation and pictures of real-world triangles to classify triangles by properties.

Polygons

4th Grade Math

Â» Unit:

Geometry

Big Idea:Polygons can be described by their attributes, such as lines and angles.

Triangles

4th Grade Math

Â» Unit:

Geometry

Big Idea:Triangles can be identified as acute, right, or obtuse.

Quadrilaterals

4th Grade Math

Â» Unit:

Geometry

Big Idea:Quadrilaterals are four-sided polygons that have distinctive attributes.

The Quilt Code: A Lesson in Triangles Through History

4th Grade Math

Â» Unit:

Geometry

Big Idea:Students learn to identify right triangles as they study the quilt blocks that were allegedly part of the controversial American Quilt Code abolitionists used to guide slaves to freedom.

Rotational Symmetry

4th Grade Math

Â» Unit:

Geometry

Big Idea:By turning a shape to different measurements, the students can determine if a shape has rotational symmetry.

Tangrams with Grandfather Tang

5th Grade Math

Â» Unit:

Geometry

Big Idea:Creating rich tasks through integrating literature, positive interactions, and kinesthetic tasks when exploring geometric two dimensional shapes.

What is a Polygon?

4th Grade Math

Â» Unit:

Area & Perimeter

Big Idea:Students will study the difference between a polygon and nonpolygon and will apply their new learning by constructing a T-chart and comparison paragraph.

4.G.A.1

Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

4.G.A.2

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.

4.G.A.3

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.