## Reflection: Adjustments to Practice Area of Compound Shapes - Section 2: Intro to New Material

During today's lesson, I had students who preferred to compose a large rectangle, and then subtract the area of the 'missing' rectangular piece.  In example two, this would mean finding the area of the 15' by 24' rectangle, and then subtracting the 12' by 6' area.

Recognizing a new student strategy
Adjustments to Practice: Recognizing a new student strategy

# Area of Compound Shapes

Unit 10: Area of Two Dimensional Figures
Lesson 12 of 14

## Big Idea: When a compound shape is decomposed into non-overlapping figures, we can can find and combine the area of each individual shape in order to determine the total area.

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Standards:
Subject(s):
Math, area (Measurement), Geometry, square units, dimension, compound figures
65 minutes

### Carla Seeger

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