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Revision as of 13:14, 3 November 2012
The Fifth Question
Please answer the following question:
Please calculate the area of the shaded region. Use π as the circular constant.
Himeji Mizuki answer:
Assuming that the radius of the small circle is r, and the circumference as ℓ.
ℓ = 2πr
The question asks for the area between radius 1 and 3, so we’ll call it ‘S’.
Therefore, the answer is 8π.
Teacher's Comment:
Well answered. This is a standard question for area.
Yoshii Akihisa's Answer:
Iπ[1]
Teacher's Comment:
It's been a while since I felt my veins popping.
Tsuchiya Kouta's Answer:
Oπ [2]
Teacher's Comment:
Come over to the counselling room. I will like to hear your explanation.