Reflection: Staircase of Complexity SAS Area Formula - Section 1: Developing the formula


This lesson provides a good example of MP8. In the following video, learn why this is one of my favorite mathematical practice standards and how I convey that to students.


  Developing MP 8
  Staircase of Complexity: Developing MP 8
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SAS Area Formula

Unit 7: Right Triangles and Trigonometry
Lesson 4 of 6

Objective: SWBAT to derive and apply the formula for finding the area of a triangle given two side lengths and the included angle measure.

Big Idea: Batteries not included...but the angle must be. Some assembly required. In this lesson students build a new triangle area formula and learn when and how to apply it.

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3 teachers like this lesson
Math, Trigonometry, Geometry, Triangles, right triangle, Triangle Area
  55 minutes
triangle diagram
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