
Draw and identify lines and angles, and classify shapes by properties of their lines and angles
4.G.A.1 Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in twodimensional figures.
Sample Activities:
Alphabet Lines
Angles on the Geoboard
Also included in 4th Grade Math Centers:
** Geoboard Line Segments
** Name Geometry
** Angle Barrier Game
4.G.A.2 Classify twodimensional 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.
Sample Activities:
Quadrilateral Criteria
Right Triangles on the Geoboard
Also included in 4th Grade Math Centers:
** Classifying 2D Figures
** Constructing Quadrilaterals
** Sorting Right Triangles
4.G.A.3 Recognize a line of symmetry for a twodimensional 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.
Sample Activity:
Symmetry in Regular Polygons
Also included in 4th Grade Math Centers:
** Symmetrical Coin Design
** Symmetry on the Geoboard
** Symmetrical Letters
** Symmetrical Designs