Lesson plan

Decompose angles by examining a real-world situation

  • From LearnZillion
  • Created by
  • Standards
  • Tags:
teaches Common Core State Standards CCSS.Math.Content.4.MD.C.7 http://corestandards.org/Math/Content/4/MD/C/7
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
Print

You have saved this lesson plan!

Here's where you can access your saved items.

Dismiss
Content placeholder

Tip: swipe on touch devices, use your keyboard's ← and → arrow keys, or clicker buttons to quickly navigate the lesson plan

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson plan.

Big Ideas: Angles can be decomposed into smaller parts. Angle measure of the whole is the sum of the angle measures of the parts. This lesson builds on students' knowledge of measuring angles. The task asks students to take a 40-degree skateboard ramp and decompose it into smaller parts. Through exploration of a variety of smaller angles (5°, 10°, 15°, and 20°), students will see that there are many combinations of smaller angle measures that total 40 degrees, leading students to an understanding of decomposing and composing angles. They will see that a protractor is not needed to decompose an angle. Their work in decomposing angles builds towards students' future work in discovering that angles are additive. Vocabulary: angle, compose, decompose, degree
Provide feedback