TED-Ed
Why Do Honeybees Love Hexagons?
Float like a butterfly, think like a bee! Build a huge hive, hexagonally! Find out the reason that hexagons are the most efficient storage shape for the honeybees' honeycombs. This neat little video would be a sweet addition to...
Corbett Maths
Names of Quadrilaterals
They've all got four sides, but some have more interesting properties. Scholars learn the names of quadrilaterals. They also explore some properties of these quadrilaterals, including congruent angles, congruent and parallel sides, and...
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
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]
Khan Academy
Khan Academy: Classifying Triangles
Discusses the different types of triangles and their angles. [6:00]
Khan Academy
Khan Academy: Classifying Triangles by Angles
Explains how to classify a triangle just by knowing the angle sizes. [5:30]
CK-12 Foundation
Ck 12: Elem Math: Overview Sum of the Angles of a Triangle
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on funding the sum of angles in a triangle.
CK-12 Foundation
Ck 12: Elem Math: Classifying Triangles Based on Equal Sides
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to classify triangles based on side length.
CK-12 Foundation
Ck 12: Elem Math: Overview of Special Triangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find missing angles in triangles.
CK-12 Foundation
Ck 12: Elem Math: Overview of Triangle Classifications
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to classify triangles.
Virtual Nerd
Virtual Nerd: How Do You Classify Triangles?
This tutorial provides practice in classifying triangles which is useful when figuring out how to solve for various sides and angles. [7:15]
Khan Academy
Khan Academy: Worked Examples: Geometry: Geometry: Triangles and Parallelograms
Students explore the properties of triangles and parallelograms in this video tutorial.
Khan Academy
Khan Academy: Parallel and Perpendicular Lines
Demonstrates how to identify parallel and perpendicular lines in geometric drawings. [3:34]
Math Antics
Math Antics: Triangles
Gain a basic understanding of triangles by watching easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [7:39]
Math Mammoth
Math Mammoth: Acute, Obtuse, and Right Triangles
This lesson goes over the types of triangles. [7:02]
Loyola University Chicago
Math Flix: Isosceles Right Triangle
This QuickTime movie provides an opportunity to learn about the characteristics of the isosceles right triangles. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Khan Academy
Khan Academy: Classifying Triangles by Angles
You say you can't categorize a triangle because you don't know the length of the sides. Guess what? If you know the size of the angles you can!
Khan Academy
Khan Academy: Classifying Triangles
Learn to categorize triangles as scalene, isosceles, equilateral, acute, right, or obtuse.
Khan Academy
Khan Academy: Worked Example: Classifying Triangles
Work through sample problems categorizing triangles as scalene, isosceles, equilateral, acute, right, or obtuse.
Khan Academy
Khan Academy: Quadrilateral Properties
Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares.
Khan Academy
Khan Academy: Classifying Shapes by Line and Angles Types
Sal categorizes shapes based on their sides and angles.
Khan Academy
Khan Academy: Classifying Shapes by Lines and Angles
Lindsay classifies a shape based on hints about its sides and angles.