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# Unit: Area and perimeter

### About this unit

Area and perimeter help us measure the size of 2D shapes. We’ll start with the area and perimeter of rectangles. From there, we’ll tackle trickier shapes, such as triangles and circles.### Learn

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Identify your areas for growth in these lessons:

### Learn

### Practice

Test your understanding of

**Area and perimeter**with these 16 questions.