Decomposing shapes to find area: grids (Full video)

Khan Academy
Supporting grades: 3

Description: Lindsay finds the area of an irregular shape by decomposing it into 2 rectangles. So, we can find the area by seeing how many square centimeters does this figure cover? One way would be to just try to draw the little square centimeters and count them. And then we can find the area of each rectangle and add it together to find the total area that the figure covers.

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