Grade 9 Math: Intro to Geometry Surface Area of a Cone
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True or False? A cone is a solid 3dimensional object that has a circular base joined to a point by a curved side.
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True of False? the following is the correct formula for a surface area of a cone:
\(A=\pi r^{2}+\pi rs\), \(s=\sqrt{h^{2}+r^{2}}\)
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We have a right circular cone where the radius is 10cm and the height is 15cm. What is the Surface area?
440.26cm\(^2\)
546.32cm\(^2\)
645.81cm\(^2\)
880.51cm\(^2\)
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We have a right circular cone where the radius is 4cm and the height is 4cm. What is the Surface area?
121.35cm\(^2\)
60.75cm\(^2\)
185.42cm\(^2\)
211.22cm\(^2\)
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