Khan Academy Static

Topic D includes lessons 12-16. "Recognize lines of symmetry for given two-dimensional figures. Identify line-symmetric figures, and draw lines of symmetry. Analyze and classify triangles based on side length, angle measure, or both. Define and construct triangles from given criteria. Explore symmetry in triangles. Classify quadrilaterals based on parallel and perpendicular lines and the presence or absence of angles of a specified size. Reason about attributes to construct quadrilaterals on square or triangular grid paper." EngageNY (Currently, we do not have content for Lesson 16.)

8827_Classifying_shapes_by_line_and_angles_types.html

8826_Worked_example_Classifying_triangles_.html

8824_Classifying_triangles_by_angles.html

8828_Quadrilateral_properties.html

8829_Classifying_shapes_by_lines_and_angles.html

8823_Identifying_symmetrical_figures.html

8825_Classifying_triangles_.html

8822_Intro_to_reflective_symmetry.html