Instructional Video

Parallelograms and Triangles

Curated and Reviewed by Lesson Planet

Expand area problems to incorporate prior knowledge. Pupils begin by reviewing the formulas for finding the area of parallelograms and triangles. The scholars apply previous learning of trigonometric ratios and the Pythagorean Theorem to find missing distances needed to find areas of figures and continue to practice the skill of finding areas by working on problems in the provided learning exercise.

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CCSS: Adaptable
Instructional Ideas
  • Review solving quadratic equations in one variable
Classroom Considerations
  • Assumes knowledge of trigonometric ratios and special right triangles
  • Lesson one in a six-part Area of Polygons unit
  • This video is hosted on YouTube
Pros
  • Answer key shows the steps necessary to solve the problem
  • Includes a video walkthrough of the application problem on the worksheet
Cons
  • None