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Sophia Learning
Sophia: Finding the Area of Composite Figures: Lesson 4
This lesson explains how to break composite figures into more simple shapes in order to find its area. It is 4 of 4 in the series titled "Finding the Area of Composite Figures."
Khan Academy
Khan Academy: Area of Composite Shapes
Models how to break an irregular polygon into smaller composite shapes, calculate the area for each of those, then add all the amounts together to get the total area. [5:15]
Khan Academy
Khan Academy: Worked Examples: Geometry: Pythagorean Theorem, Area
Students watch a video tutorial to learn how to solve area problems of composite figures using the Pythagorean Theorem.
Loyola University Chicago
Math Flix: Pick's Formula for Irregular Shapes
This QuickTime movie provides an excellent introduction to Pick's Formula for irregular shapes with several examples. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Add
Demonstrates how to break an irregular shape into three rectangles, find the individual areas, and then add them together. [3:36]
Khan Academy
Khan Academy: Area of Kites
Learn how to find the area of a kite. A kite is a type of quadrilateral that is symmetric around one of its diagonals.
Sophia Learning
Sophia: Finding the Area of Composite Figures: Lesson 3
This lesson explains how to break composite figures into more simple shapes in order to find its area. It is 3 of 4 in the series titled "Finding the Area of Composite Figures."