# Finding the Area of a Circle

#### What's Included

• Smart Notebooks Presentation
• Interactive Excel File
• Activ Inspire Flipchart
• Lesson Plan
• Microsoft PowerPoint Presentation
• Differentiated Worksheet

# Finding the Area of a Circle

Students learn how a circle can be formed into a parallelogram and rectangle so the area is derived as A =πr2.  As learning progresses students practice finding the area of a circle in terms of π and calculate the radius or diameter when the area is given.

The start of the lesson recaps finding the area of a triangle and parallelogram.  In the plenary students are challenged to use to square and circle of equal area to find the perimeter of the square.

##### Differentiated Learning Objectives
• All students should be able to calculate the area of a circle to 3 significant figures.
• Most students should be able to calculate the area of a circle as a multiple of π.
• Some students should be able to solve problems involving the area of a circle.
Circles, Cylinders and Circular Shapes

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