Finding the Area of a Circle

Finding the Area of a Circle
Finding the Area of a Circle
Finding the Area of a Circle
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.
View online lesson
Lesson Downloads
Download PowerPoint Download Notebook Download Flipchart Download WorksheetDownload Interactive Excel File
Scheme of Work Link
Circles, Cylinders and Circular Shapes 
IMMEDIATE DOWNLOAD

Mr Mathematics Blog

Mathematics OFSTED Inspection – The Deep Dive

Earlier this week, my school took part in a trial OFSTED inspection as part of getting ready for the new inspection framework in September 2019. This involved three Lead Inspectors visiting our school over the course of two days. The first day involved a ‘deep dive’ by each of the Lead Inspectors into Mathematics, English […]

How to Solve Quadratics by Factorising

The method of how to solve quadratics by factorising is now part of the foundational knowledge students aiming for higher exam grades are expected to have.   Here is an example of such a question. Solve x2 + 7x – 18 = 0 In my experience of teaching and marking exam papers students often struggle with […]

How Write 3 Part Ratios

When learning how to write 3-part ratios students need to understand how ratios can be made equivalent. The start of the lesson reminds students by asking which of six ratios is the odd one out.  This is presented to the class as they come into the lesson.    Writing Equivalent Ratios  A few students immediately go […]