Khan Academy
Khan Academy: Angle Types
In this exercise, students practice identifying angle types. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Identify Points, Lines, Line Segments, Rays, and Angles
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.
Khan Academy
Khan Academy: Recognize Angles
Determine if angles in shapes and pictures are acute, right, or obtuse. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Identify Parallel and Perpendicular Lines
Recognize parallel and perpendicular lines in geometric figures and pictures. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Lines, Line Segments, and Rays Review
Reviews the characteristics of lines, lines segments, and rays, and presents questions for additional practice. Questions include hints.
Khan Academy
Khan Academy: Draw Parallel and Perpendicular Lines
Practice drawing parallel and perpendicular lines, line segments, and ray. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Draw Angles
Use a protractor to construct angles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Overview of Parallel Lines
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of parallel lines.
CK-12 Foundation
Ck 12: Elem Math: Determining Whether Lines Are Parallel
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems to determine if lines are parallel.
Illustrative Mathematics
Illustrative Mathematics: 4.md,g Measuring Angles
The purpose of this task is to gain experience drawing and measuring angles, developing an understanding of the additive structure of angles. Aligns with 4.MD.C.7.
Illustrative Mathematics
Illustrative Mathematics: 4.g What's the Point?
The purpose of this task is to use what students intuitively understand about connecting points or dots with lines to generate a discussion about what points are and how they should be represented. Aligns with 4.G.A.1.
Khan Academy
Khan Academy: Draw Rays, Lines, & Line Segments
Draw rays, lines, and line segments with given points. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
ArtsNow
Arts Now Learning: Monumental Construction [Pdf]
In this lesson plan, students work in teams to create large paper sculptures using newspaper rolled up into tubes.
Khan Academy
Khan Academy: Draw Right, Acute, and Obtuse Angles
Create an acute, right, or obtuse angle using a given vertex. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Determining Whether Lines Are Perpendicular
[Free Registration/Login may be required to access all resource tools.] Students watch two videos and attempt practice problems on how to determine if two lines are perpendicular.
Math Planet
Math Planet: Geometry: Measure and Classify an Angle
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]
Alabama Learning Exchange
Alex: Geometric Man
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...
Better Lesson
Better Lesson: Finding Angles
The three types of angles, right, acute, and obtuse, exist in our everyday surroundings. Students find these angles using classroom items.
Scholastic
Scholastic: Study Jams! Math: Geometry: Classify Angles
Watch and learn how to classify angles then test your knowledge.
Cuemath
Cuemath: Perpendicuar
A comprehensive guide for learning all about perpendicular lines with definitions, how to draw them, solved examples, and practice questions
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...
Math Is Fun
Math Is Fun: Definition of Bisector
A clear definition and drawing of a bisector, a line that divides one angle into two.
The Math League
The Math League: Basic Terms: Lines
This tutorial gives a very basic definition of lines.