4.G. Grade 4 - Geometry

4.G.A. 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 two-dimensional figures.

• Measuring Angles
• The Geometry of Letters
• What's the Point?

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.

• Are these right?
• Defining Attributes of Rectangles and Parallelograms
• Finding an unknown angle
• What is a Trapezoid? (Part 1)
• What shape am I?

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.

• Finding Lines of Symmetry
• Lines of symmetry for circles
• Lines of symmetry for quadrilaterals
• Lines of symmetry for triangles