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Area of Rectangles and Composite Shapes
A Video Slide Lesson by: Kawana Atkins
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Purpose of Today's Lesson
The purpose of this lesson is to teach 3rd grade students how to find the area of rectangles and composite shapes. This lesson is taught on the first day of a seven day unit. 3rd Grade students are introduced counting unit squares as a strategy for finding area and multiplying the length times the width to find the area.
- The students will count unit squares to the find the area of a rectangle.
- The students will multiply the length times the width of a rectuangle to find the area.
- The students will use the distributive property to find the area of composite shpaes.
By the end of this lesson...
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Interactive Lesson Vocabulary
Click on each picture to learn the vocabulary
Area
The amount of space in a shape
unit square
Count the Unit Squares to find the area
Place a number on each square to determine the area.
Real-life examples of finding Area
Arjun is looking for an area rug for his bedroom. His mother told him that the area of the rug has to be 36 unit squares. Click on the rug to help Arjun find the length and the width of the rug that is 36 square units.
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Solve Area using the Distrubitive Property
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Click on the Expression to go to weblink to Match the Model
Click on the image below to find the area
of the composite shape
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