## 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

# SAS Area Formula

Unit 7: Right Triangles and Trigonometry
Lesson 4 of 6

## 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.

Print Lesson
2 teachers like this lesson
Standards:
Subject(s):
Math, Trigonometry, Geometry, Triangles, right triangle, Triangle Area
55 minutes

### Anthony Carruthers

##### Similar Lessons

###### The Law of Sines: More than Meets the Eye
12th Grade Math » Additional Trigonometry Topics
Big Idea: Using the Law of Sines will throw your students for a loop - there are two possible answers!
Favorites(1)
Resources(10)
Troy, MI
Environment: Suburban

###### Area of Triangles
12th Grade Math » Solving Problems Involving Triangles
Big Idea: Why does (1/2)*a*b*sin(C) give the area of a triangle?
Favorites(2)
Resources(19)
Independence, MO
Environment: Suburban

###### Review for Trigonometry Unit Assessment
Geometry » Triangle Similarity and Trigonometric Ratios
Big Idea: In this review lesson, students will apply their understanding of triangle similarity and trigonometry to write proofs.
Favorites(0)
Resources(10)
Sunnyvale, CA
Environment: Suburban