4.G.A Videos - Free Educational Videos for Students in K - 12


Lumos Video Store

This page provides a list of educational videos related to 4.G.A. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to 4.G.A.


Symmetry for 4th Graders


By Brooke Wert

Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts.

      Lines, Rays, Line Segments, Points, Angles, Union & Intersection - Geometry Basic Introduction


      By The Organic Chemistry Tutor

      basic introduction into lines, rays, line segments, points, and angles. It also explains the difference between the union and intersection symbols and contains a few practice problems associated with it.

          [4.G.3-1.0] Lines of Symmetry - Common Core Standard


          By Freckle education

          Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts.

              Lines of Symmetry


              By Bespoke education

              How to find lines of symmetry.

                  Math Antics - Points, Lines, & Planes


                  By mathanatics

                  Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

                      Acute Triangle - YourTeacher.com - Geometry Help


                      By yourteachermathhelp

                      In this lesson students learn to classify triangles as acute (all angles acute) right (one angle right) or obtuse (one angle obtuse). Students also learn that the sum of the measures of the angles of a triangle is 180 degrees and students are asked to use this formula to find the measures of missing angles in given triangles.

                          Introduction to Symmetry


                          By mathwithlarry

                          Introductory lesson concerning symmetry. Instructor Larry explains the general idea of symmetry and gives examples with letters in this clip. The instructor uses computer software for demonstration.

                              Point Line and Line Segment


                              By TopperLearning

                              Point Line and Line Segment

                                  Categorizing triangles | Geometry | 4th grade | Khan Academy


                                  By Khan Academy

                                  Let's practice categorizing triangles in this example exercise.

                                      Axis of symmetry


                                      By Khan Academy

                                      Sal introduces the concept of an axis of symmetry.167

                                          Flipped Classroom Lines and Angles


                                          By Megan Priole

                                          Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines.

                                              Point Line Plane


                                              By Pete Anderson

                                              The instructor uses an electronic sketchpad to explain and demonstrates the fundamental concepts (undefined terms)of geometry: point line plane.

                                                  Recognizing parallel and perpendicular lines


                                                  By Khan Academy

                                                  Let's now apply what we learned and do an exercise together in which we identify parallel and perpendicular lines.This is great practice.

                                                      Recognizing parallel and perpendicular lines


                                                      By Khan Academy

                                                      Do the two lines intersect or stay apart? If they intersect, do they do so thereby creating a 90 degree angle? These are the kinds of questions we ask ourselves when we learn about parallel and perpendicular lines.

                                                          Recognizing angles


                                                          By Khan Academy

                                                          Let's do a few example exercises in which you recognize and identify the type of given angle. This is a lot of fun!

                                                              Parallel and Perpendicular Lines, Transversals, Alternate Interior Angles, Alternate Exterior Angles


                                                              By The Organic Chemistry Tutor

                                                              parallel and perpendicular lines in addition to transversals and all the angles that are formed by it such as alternate interior and exterior angles.

                                                                  Grade 5 Math - Classifying Plane (2-D) Shapes 7


                                                                  By Lumos Learning

                                                                  Using the Lumos Study Programs, parents and educators can reinforce the classroom learning experience for children and help them succeed at school and on the standardized tests. Lumos books, dvd, eLearning and tutoring are used by leading schools, libraries and thousands of parents to supplement classroom learning and improve student achievement in the standardized tests.

                                                                  PARENTS please visit LumosTestPrep.com to learn more.
                                                                  EDUCATORS please visit LumosLearning.com to learn more

                                                                      Recognizing rays, lines, and line segments


                                                                      By Khan Academy

                                                                      Let's get familiar with the difference between lines, line segments, and rays. Hint: a ray is somewhere between a line and a line segment!