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### Course: Middle school math (India) > Unit 1

Lesson 9: Week 9- Finding missing side length when given perimeter
- Perimeter of triangles, squares, rectangles, quadrilaterals
- Intro to area and unit squares
- Concept of areas
- Counting unit squares to find area formula
- Area of a rectangle
- Finding missing side when given area
- Area of rectangle and square shapes
- Decomposing shapes to find area: subtract
- Finding area of a road made in a rectangular and square field

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