Tagged: circle

Pizza maths


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This week in Maths we are continuing our study of area, looking at the area of circles. Earlier in the year we measured the diameter and circumference of many different-sized circles and found the relationship between those values. We found that the ratio between the diameter and the circumference of a circle is a little more than 3. Archimedes, the famous Greek mathematician, accurately determined the value of ‘pi’ over 200 BC. We use pi = 3.14 or 22/7 as an estimate for calculations, as the real value is a never-ending (irrational) number. This value can be used to calculate the area of a circle. Students calculated the area of small, medium and large pizzas and then we used the prices of different pizzas from our local restaurant to calculate the value of different sizes and toppings.