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...

Get independent practice identifying points, lines, rays, planes and angles. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.

Recognize rays, lines, and line segments in geometric figures. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

A list of geometry definitions and a matching activity.

Provides details about the properties of straight lines, types of straight lines, line segments, rays, curved lines, and types of angles.

Students can review basic geometric terms using these self-check, multiple choice questions. Three levels of questions are provided.

Explore lines and angles, and the relationship between the two.

Explains the terms and symbols used to discuss line angles, what an angle is, and the types of angles. Includes short video lesson demonstrating how to use a protractor to measure an angle. [0:57]

In this lesson plan, students will identify and draw lines, segments, rays, angles, and points.

In this lesson, students use line segments, angles, and parallel and perpendicular lines in order to create a one point perspective drawing.

[Free Registration/Login Required] In this lesson the teacher will use geometry and spatial sense to distinguish between point, ray, line, line segment and angle. The students will review vocabulary for these terms and then...

The lesson discusses commonly used geometric terms. Definitions and examples of a line segment, ray, and angle are included.

[Free Registration/Login Required] Students use the interactive features of Activstudio to identify and label one and two dimensional characteristics. Students explore rays, lines, end points, line segments, vertices, and angles.

Provides examples and a video lesson that introduce fundamental statements of geometry.

The students will explore angles, rays, line segments, perpendicular lines, parallel lines, and two-dimensional figures through the use of the book Shape Up! Fun With Triangles and Other Polygons by David A. Adler. They will also...

Scroll down to Lesson 2 for a tutorial on image formation in plane mirrors. The tutorial from Glenbrook South High School provides lessons on why and how an image is formed, image characteristics for plane mirrors, ray diagrams, plus more.