2. Area, Volume, and Angles (G)
  3. Lesson 1: Areas of Parallelograms, Triangles, and Trapezoids

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Areas of Parallelograms, Triangles,
and Trapezoids

Source: Glass Pyramid - wolv/E+/Getty Images

Formulas for Area

Why might we need many different formulas for calculating area? 

 

 

Lesson Goals

  • Review the definition of area.

Source: Gears - Hilch/iStock/Getty Images Plus

 

Try This!

Consider the following parallelogram and trapezoid with side lengths labelled.

A parallelogram with side lengths 11 cm and 5 cm and a height of 3 cm

A trapezoid with bottom 8 cm, top 3 cm, a side length of 5 cm, and height of 3 cm.

Think about this problem, then move on to the next part of the lesson.

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