Area Formulas
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Lesson Summary:
In this lesson, you will learn about area formulas for various geometrical shapes such as parallelograms, triangles, and trapezoids. The area of a parallelogram is simply the base times the height, the area of a triangle is half the base times the height, while the area of a trapezoid is typically calculated as half the height times the sum of the bases. The lesson also includes practical examples and problem-solving exercises.
Lesson Description:
Learn about formulas for the area of shapes. Understand why those formulas work as well as how to use them.
Additional Resources:
- Parallelogram website - NCTM Illuminations website that lets you play with the lengths of sides of a parallelogram and explore its area.
- Area Formulas Notes - Notes from the presentation on area formulas.
- Geometry Formulas - A list of areas, volumes, and surface areas for geometric shapes.
Questions answered by this video:
- What are the formulas for the area of shapes?
- How do you know what the area of a trapezoid is?
- How do you derive the area formula for a trapezoid, parallelogram, and triangle?
- What is the area of a trapezoid?
- What are some real-world problems that involve solving an equation with a trapzoid?
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Staff Review
Great explanation for how to understand area formulas. A very good video for students just learning about the area of geometric shapes. -
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