CK-12 Foundation
Classifying Triangles: Lesson
That's correct, it is right and scalene. The video introduces the two methods for classifying triangles, sides, and angles. A resource in the playlist for basic geometry provides the definitions for each of the classifications.
Math Antics
Quadrilaterals
Introduce the class to the quad in quadrilaterals. The presentation provides the names and definitions for the basic special quadrilaterals. A graphic shows the connections between the types of quadrilaterals introduced. The video points...
Math Antics
Triangles
What has three sides and is adorable? A-cute triangle. The resource introduces triangles and how to classify them by sides and angles or both. The video concludes with using the sum of the angles of a triangle to show how to solve for a...
Scholastic
Study Jams! Classify Quadrilaterals
Face the vertex of two-dimensional shapes and discover what each figure requires as part of its classification. With one shape per slide, learners see what makes each shape special and compare it to others with similar qualities.
Khan Academy
Khan Academy: Classifying Shapes by Lines and Angles
Demonstrates how to find what 2D shape matches a set of properties. [3:37]
CK-12 Foundation
Ck 12: Elem Math: Overview of Lines Curves Vertices and Sides of 2 D Shapes
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on lines, curves and vertices of two dimensional shapes.
Sophia Learning
Sophia: What Composite Figures Are
This lesson defines the phrase composite figure. Students can watch a video tutorial and then take an online quiz.
Imagine Learning Classroom
Learn Zillion: Classify and Compare Quadrilaterals
In this lesson, you will learn to compare and analyze quadrilaterals by their properties. [4:07]
CK-12 Foundation
Ck 12: Elem Math: Overview of Basic 3 D Figures
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of basic three dimensional figures.
CK-12 Foundation
Ck 12: Elem Math: Overview of Quadrilaterals
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of various quadrilaterals.
Loyola University Chicago
Math Flix: Polygons
This video [4:39] provides an opportunity to learn about the characteristics of polygons. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Polyhedra Formula for Vertices
This QuickTime movie provides an opportunity to discover the formula for finding the number of vertices on a polyhedron. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Khan Academy
Khan Academy: Quadrilateral Properties
Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares.
Khan Academy
Khan Academy: Classifying Quadrilaterals
Sal classifies quadrilaterals by their properties (such as parallel sides).
PBS
Pbs Learning Media: Mighty Mathematicians
Math is as easy as 1,2,3 with a little help from your favorite PBS KIDS friends. The media in this collection is centered around counting, operations, geometry and more! Dive into each sub-collection and discover new ways to explore math...