These sites describe points, lines, line segments, and rays. Learn the difference between parallel, perpendicular, and intersecting lines. Includes online games, worksheets, lesson plans, and practice questions. There is a link to an eThemes Resource on shapes.
Click on "Enter Dictionary Here" to Search the dictionary. Then select the "Ll" letter-link to access the terms beginning with the letter "L". Next, click on the term "line (types of)" to see a definition of line. Learn various types of lines, segment, arc, interval, ray, and more.
This lesson plan offers an activity idea for introducing these concepts to students. Click on the "Discussion" link for some possible questions the students might ask, and click on "Graph Paper" for a practice page you can print out.
This is a collection of sites about geometric shapes and polygons. Includes definitions plus examples of them in everyday life. Learn about prisms and polygons. There are interactive sites with games, online manipulatives, and animated movies on polygons and triangles.