Sophia Learning
Sophia: Tessellation
This video lesson introduces and provides examples of tessellations. Students can check their understanding with an assessment. [3:32]
Sophia Learning
Sophia: The Pythagorean Theorem
Determine how to find the missing side length or the hypotenuse of a right triangle using the Pythagorean theorem. Check understanding with a quiz.
Sophia Learning
Sophia: Area of a Parallelogram With Triangles and Rectangles
In this video tutorial lesson, determine the area of a parallelogram using triangles and rectangles then assess learning with a quiz. [3:34]
Sophia Learning
Sophia: Area of a Trapezoid
In this video, students will determine the area of a trapezoid and assess learning with a quiz. [4:24]
Sophia Learning
Sophia: Area of a Triangle
This video tutorial shares several examples of different types of triangles as they are used to determine the area of each triangle. Assessment checks understanding. [6:54]
Sophia Learning
Sophia: Area of Regular Polygons
This video lesson demonstrates how to find the area of any regular polygon using the apothem. Students can check their understanding with an assessment.
Imagine Learning Classroom
Learn Zillion: Find the Area of a Shape Using a Key to Find the Unit of Measure
In this lesson, you will learn how to find the area of a shape by using a key to find the unit of measure. [3:09]
Imagine Learning Classroom
Learn Zillion: Draw Triangles Using Given Angles
In this lesson, you will learn how to draw triangles by using given angles. [3:25]
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]
Imagine Learning Classroom
Learn Zillion: Lesson Video for 'Create a Right Triangle on a Coordinate Plane'
In this lesson, you will learn how to create a right triangle on a coordinate plane by using two points that form a diagonal line segment. [4:39]
Shmoop University
Shmoop: Polygons by Shmoop
In this video, ""Polygon" - it's not just something we say when our pet parrot escapes through the kitchen window. Curious to find out what angle these guys are playing?"
Math Antics
Math Antics: Quadrilaterals
Gain a basic understanding of quadrilaterals by watching this easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [9:49]
Math Antics
Math Antics: Polygons
Gain a basic understanding of polygons by watching this easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [7:26]
Khan Academy
Khan Academy: Worked Examples: Geometry: Interesting Perimeter and Area Problems
Students explore three example problems involving perimeter and area of complex shapes.
Khan Academy
Khan Academy: Triangle Angle Properties: Sum of the Exterior Angles of Polygon
Students explore a more elegant way to find the sum of the exterior angles of a convex polygon.
Khan Academy
Khan Academy: Triangles: Congruent Triangle Example 2
Students watch a video tutorial showing that segments have the same length using triangle congruence properties.
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.
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals
This lesson demonstrates how to determine properties of quadrilaterals by using triangles.
Sophia Learning
Sophia: Using Triangles to Find the Sum of Interior Angles: Lesson 2
This lesson demonstrates how to use triangles to determine the sum of the interior angles of a polygon. It is 2 of 5 in the series titled "Using Triangles to Find the Sum of Interior Angles."
Sophia Learning
Sophia: Using Triangles to Find the Sum of Interior Angles
This lesson demonstrates how to use triangles to determine the sum of the interior angles of a polygon.
Sophia Learning
Sophia: Using Triangles to Find the Sum of Interior Angles: Lesson 3
This lesson demonstrates how to use triangles to determine the sum of the interior angles of a polygon. It is 3 of 5 in the series titled "Using Triangles to Find the Sum of Interior Angles."
Sophia Learning
Sophia: Using Triangles to Find the Sum of Interior Angles
This lesson demonstrates how to use triangles to determine the sum of the interior angles of a polygon.
Sophia Learning
Sophia: Using Triangles to Find the Sum of Interior Angles: Lesson 4
This lesson demonstrates how to use triangles to determine the sum of the interior angles of a polygon. It is 4 of 5 in the series titled "Using Triangles to Find the Sum of Interior Angles."