Circles

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Circles

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.  ...

Finding the Circumference of a Circle

Students learn about finding the circumference of a circle as a multiple of π and as a decimal correct to 3 sign...

Problems with Circular Shapes

Students use the circumference and area of a circle to solve a variety of problems with circular shapes.  Throug...

Total Surface Area of Cylinders

Students learn how to calculate the total surface area of cylinders using net drawings.  As learning progresses ...

Volume of a Cylinder

Students learn how to calculate the volume of a cylinder both in terms of pi and as a decimal to three significa...

Circumference of Circles Problems

This lesson consolidates calculating the circumference of a circle and the perimeter of circular shapes.  Studen...

Circumference of Circles

Students are taken through the process of discovering the relationship between the radius, diameter and circumfe...

Area of Circles Problems

The lesson is intended to consolidate applying the area of circle formula to solve complex problems.  To extend ...

Area of Circles

Students are guided though the derivation of the Area of a Circle formula by approximating a circle from its sec...

Mr Mathematics Blog

Surface Area of Cylinders

When I teach how to find the surface area of cylinders I like to add a constant level of challenge and enjoyment to the lesson.  Rather than repetitively calculating the surface area of a cylinder I introduce more complex cylindrical shapes. How to find the Surface Area of Cylinders To find the surface area of […]

Teaching Mathematics for a Growth Mindset

Inspiring students to enjoy maths and feel the success that comes with attempting a difficult challenge is why I teach.  The feeling of success is addictive.  The more students experience it the more they want it and the further out of their comfort zone they are willing to go to get more of it.  Teaching […]

Equation of Straight Line Graphs

To find the equation of straight line graphs students need to calculate the gradient using two pairs of coordinates and the intercept which is the y value of where it crosses the vertical axis.  Examiner’s reports of past exam questions show students are more able to find the intercept of a straight line than they […]