Khan Academy
Khan Academy: Parallel and Perpendicular Lines
Demonstrates how to identify parallel and perpendicular lines in geometric drawings. [3:34]
CK-12 Foundation
Ck 12: Elem Math: Overview of Lines Curves Vertices and Sides of 2 D Shapes
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on lines, curves and vertices of two dimensional shapes.
CK-12 Foundation
Ck 12: Elem Math: Overview of Reflective Symmetry
[Free Registration/Login may be required to access all resource tools.] Students watch a video tutorial on line or reflective symmetry.
Khan Academy
Khan Academy: Angles, Parallel Lines, & Transversals
Looks at parallel lines and intersecting lines (transversals), and the angles they form. [7:08]
Virtual Nerd
Virtual Nerd: Common Core State Standards Grade 5 geometry5.g.a5.g.a.1 Common Core
Tutorials that show the origins, X and Y coordinates, etc.