Math Curriculum
Level C
Unit: Geometry
Key Lesson 6.1.9 Formula for the Area of a Triangle
Lesson topic: Finding the area of triangles
Instructor Materials
- Teacher guide
- Slides
- Practice Problems resource
- CCRS standard: 6.G.1, 6.EE.2a, 6.EE.2c
- Learning goal: Compare, contrast, and critique (orally) different strategies for determining the area of a triangle. Generalize a process for finding the area of a triangle, and justify (orally and in writing) why this can be abstracted as 1/2 × b × h. Recognize that any side of a triangle can be considered its base, choose a side to use as the base when calculating the area of a triangle, and identify the corresponding height.
- 6.1 Assessment and Practice Problems
Student Materials
Related Lessons
Preparation
If students need additional lessons before this key lesson, use these supplemental lessons.
Review and Extend
Use these supplemental lessons if needed after teaching this key lesson.
Used with permission:
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2. Adaptations and updates to IM K-5 Math are copyrighted 2019 by Illustrative Mathematics®, and are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).
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