Standard #: MA.4.G.3.2 (Archived Standard)


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Justify the formula for the area of the rectangle "area = base x height".


Remarks


The students should be able to justify the formula for the area of the rectangle by explaining how counting units to find area of a rectangle is related to finding the area by multiplying.

 

The idea of the area of a rectangle as "base x height" rather than "length x width" is useful in connecting to other area formulas.

 



General Information

Subject Area: X-Mathematics (former standards - 2008)
Grade: 4
Body of Knowledge: Geometry
Big Idea: BIG IDEA 3 - Develop an understanding of area and determine the area of two-dimensional shapes.
Date Adopted or Revised: 09/07
Date of Last Rating: 06/07
Status: State Board Approved - Archived
Assessed: Yes

Test Item Specifications

    Item Type(s): This benchmark may be assessed using: MC item(s)
    At Grade 4, this benchmark will be assessed using MC items.

    Clarification :
    Students will identify situations that require the use of the area formula in real-world contexts.

    Students will identify the number of square units of a rectangle as the base times the height.
    Content Limits :
    Items may include deriving or explaining the area of a rectangle in order to solve real-world problems.

    Items will not include the formula for the area of a rectangle.
    Stimulus Attributes :
    Items may be set in either a real-world or a mathematical context.

    Items may be on a grid, but a grid is not required.

    Graphics should be used in all these items.
    Response Attributes :
    Responses should include units.


Sample Test Items (1)

Test Item # Question Difficulty Type
Sample Item 1 Mr. Clark hired workers to construct an in-ground pool in his backyard. For which of the following situations might the workers have used the area formula when constructing the pool? N/A MC: Multiple Choice


Related Resources

Lesson Plan

Name Description
Area Isn't Just for Squares

This lesson helps students make the connections between area and multiplication using square tiles.

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