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Task 6: Investigate the surface area of a cone (Face-to-face lesson)
You are required to work in a group of 4. Your group is given a cone. Cut its edge so that you can view its net. Can you derive the fomula for calculating the area of its net? Do the experiment and think about the following questions. Post the finding in THIS BLOG. (Deadline: 18th August 11:59p.m.)
Let ' r' be the radius and 'l' be the side height.
a) What is the area of the circle?
b) What is the similarity between the picture on your right and the net?
c) What is the area of the curved surface?
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