Homeschool Math
Homeschool Math: Lines, Rays, and Angles
This fourth-grade geometry lesson teaches the definitions for a line, ray, angle, acute angle, right angle, and obtuse angle. We also study how the size of the angle is ONLY determined by how much it has "opened" as compared to the whole...
Mocomi & Anibrain Digital Technologies
Mocomi: Lines and Angles
Provides details about the properties of straight lines, types of straight lines, line segments, rays, curved lines, and types of angles.