Area of Trapezoid

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“The student sees the trapezoid is equal in area to a rectangle whose base is the average base of the trapezoid, and whose altitude is the same as that of the trapezoid.” -Foster, 1921

Keywords

rectangle, quadrilateral, parallelogram, comparison, visual math, cut and paste, hands on math, trapezoid area

Galleries

Quadrilaterals

Source

Ellsworth D. Foster ed. The American Educator (vol. 1) (Chicago, IL: Ralph Durham Company, 1921)

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