It is important to know how to do this for any GCSE maths paper. There are two very useful formula but they can be a little confusing to remember. To help you, I have a fun ditty that my maths teacher taught me when I was at school (many moons ago!).
Tweedle Dum and Tweedle Dee
Round the circle is Pi times d
If the area is to be declared
Use the formula Pi r squared
Of course, you’ve got to understand what the d and the r represent. Pi is represented as the π symbol. It can either be simplified to something like 3.14 or you can use the π button on your calculator.
Here’s a handy diagram, recapping the component parts of a circle:
So in summary, these are the two formula you’d need to know for a GCSE maths exam.
Circumference of a Circle = πd
Area of a Circle = πr2
All of this can be found on a handy, FREE to download, PDF file that I have created – DOWNLOAD – How to calculate the area and circumference of a circle.
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About Me
My name is Nicola Bhalerao and I am a private tutor based in Warwick. Since 2013, I have provided one-to-one tuition for children and adults. I specialise in maths tutoring, but cater for different requests, ranging from 11+ to various computing skills, including website training.
My background is in computing, with a Computer Science degree from Warwick University. I have worked many years as a programmer, latterly in the games industry. Both my sons were tutored by me for the 11+ (they went to a local grammar school). I received training for teaching secondary school maths and I am fully CRB checked.
I am a WordPress expert, having spent many years creating numerous websites with my other business, Smiling Panda Web Design. Although I no longer actively work on websites for others, I offer help with understanding / updating / creating your own WordPress website.
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"Nicola has been very supportive by helping me to fill in the blanks left over from my high school education. This has been crucial to improving my confidence in mathematics"
"I was lacking confidence in maths. Nicola was a fantastic teacher and really helped to improve my technique and approach to maths problems. She is patient, understanding and friendly"
"She was very friendly and professional. After a few sessions I felt much more confident in my ability and passed the numerical reasoning tests. She explains things very clearly"
"Nicola was a patient tutor, always helpful in answering any questions I had. I’d always found maths quite a scary subject, but through Nicola's tutoring I found I built confidence with the subject"
"Nicola has been very supportive by helping me to fill in the blanks left over from my high school education. This has been crucial to improving my confidence in mathematics"
"I was lacking confidence in maths. Nicola was a fantastic teacher and really helped to improve my technique and approach to maths problems. She is patient, understanding and friendly"
"She was very friendly and professional. After a few sessions I felt much more confident in my ability and passed the numerical reasoning tests. She explains things very clearly"
"Nicola was a patient tutor, always helpful in answering any questions I had. I’d always found maths quite a scary subject, but through Nicola's tutoring I found I built confidence with the subject"