Khan Academy
Khan Academy: Perimeter & Area of Composite Shapes
Sal finds perimeter and area of a non-standard polygon.
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals: Lesson 2
This lesson demonstrates how to determine properties of quadrilaterals by using triangles. It is 2 of 5 in the series titled "Using Triangles to Examine Quadrilaterals."
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals: Lesson 4
This lesson demonstrates how to determine properties of quadrilaterals by using triangles. It is 4 of 5 in the series titled "Using Triangles to Examine Quadrilaterals."
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: 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: 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."
Loyola University Chicago
Math Flix: Area and Perimeter Explanation
This QuickTime movie presents a problem to find the area of a multi-sided shape that requires an extended response. The teacher and student discuss how to work through it together to find the solution. As you watch and listen to the...
Loyola University Chicago
Math Flix: Perimeter Equal Perimeter Word Problem
This QuickTime movie introduces the basics of perimeter and an example of how to solve equal perimeter word problems. 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: Area & Perimeter Writing Rectangle Riddles
This QuickTime movie explains how to write a rectangle riddle that uses the area and perimeter. 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: Area & Perimeter Solving Rectangle Riddles
This QuickTime movie compares the area and perimeter of rectangles in the form of a riddle. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.