SOLUTION: A cone is formed from a circle of radius 12 cm with a 90* sector removed, what is the lateral area of the cone to the nearest square centimetre

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Question 1189475: A cone is formed from a circle of radius 12 cm with a 90* sector removed, what is the lateral area of the cone to the nearest square centimetre
Answer by ikleyn(52803) About Me  (Show Source):
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OBVIOUSLY, the lateral area of the cone is equal to 3/4 of the circle area, which has the radius 12 cm


    lateral area of the cone = %283%2F4%29%2Api%2A12%5E2 = %283%2F4%29%2A3.14%2A12%5E2 = 339.12 sq. cm = 339 sq. cm to the nearest whole square centimeter.   ANSWER

Solved.