Rectangles, parallelograms, and now trapezoids — so many quadrilaterals! Building on the previous lessons in the series, the video introduces the formula for the area of a trapezoid. The instructor shows images of trapezoids and those requiring coordinate geometry.

Concepts

area, area formulas, area of trapezoids, formulas, coordinate geometry

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Additional Tags

math

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Instructional Ideas

• Create a guided notes document for learners to record thoughts as they view the video
• Ask pupils to use the formula to calculate the area of the trapezoids and then watch the video to check their work

Classroom Considerations

• Class members should understand order of operations within an algebraic expression

• This video is hosted on YouTube

Pros

• Takes time to explain the components of the formula for the area of a trapezoid
• Shows trapezoids oriented in different ways

Cons

• Examples do not include context, which impacts the relevance of the concept

Common Core

HSG-GPE.B.7